#### Chapters

Chapter 2: Powers

Chapter 3: Squares and Square Roots

Chapter 4: Cubes and Cube Roots

Chapter 5: Playing with Numbers

Chapter 6: Algebraic Expressions and Identities

Chapter 7: Factorization

Chapter 8: Division of Algebraic Expressions

Chapter 9: Linear Equation in One Variable

Chapter 10: Direct and Inverse Variations

Chapter 11: Time and Work

Chapter 12: Percentage

Chapter 13: Proft, Loss, Discount and Value Added Tax (VAT)

Chapter 14: Compound Interest

Chapter 15: Understanding Shapes-I (Polygons)

Chapter 16: Understanding Shapes-II (Quadrilaterals)

Chapter 17: Understanding Shapes-III (Special Types of Quadrilaterals)

Chapter 18: Practical Geometry (Constructions)

Chapter 19: Visualising Shapes

Chapter 20: Mensuration - I (Area of a Trapezium and a Polygon)

Chapter 21: Mensuration - II (Volumes and Surface Areas of a Cuboid and a Cube)

Chapter 22: Mensuration - III (Surface Area and Volume of a Right Circular Cylinder)

Chapter 23: Data Handling-I (Classification and Tabulation of Data)

Chapter 24: Data Handling-II (Graphical Representation of Data as Histograms)

Chapter 25: Data Handling-III (Pictorial Representation of Data as Pie Charts or Circle Graphs)

Chapter 26: Data Handling-IV (Probability)

Chapter 27: Introduction to Graphs

#### RD Sharma Mathematics Class 8 by R D Sharma (2019-2020 Session)

## Chapter 11: Time and Work

#### Chapter 11: Time and Work Exercise 11.10 solutions [Pages 10 - 11]

Rakesh can do a piece of work in 20 days. How much work can he do in 4 days?

Rohan can paint \[\frac{1}{3}\] of a painting in 6 days. How many days will he take to complete the painting?

Anil can do a piece of work in 5 days and Ankur in 4 days. How long will they take to do the same work, if they work together?

Mohan takes 9 hours to mow a large lawn. He and Sohan together can mow it in 4 hours. How long will Sohan take to mow the lawn if he works alone?

Sita can finish typing a 100 page document in 9 hours. Mita in 6 hours and Rita in 12 hours. How long will they take to type a 100 page document if they work together?

*A*,* B* and *C* working together can do a piece of work in 8 hours. *A* alone can do it in 20 hours and *B* alone can do it in 24 hours. In how many hours will *C* alone do the same work?

*A* and *B* can do a piece of work in 18 days; *B* and *C* in 24 days and *A* and *C* in 36 days. In what time can they do it, all working together?

*A* and *B* can do a piece of work in 12 days; *B* and *C* in 15 days; *C* and *A* in 20 days. How much time will *A* alone take to finish the work?

*A*, *B* and *C* can reap a field in \[15\frac{3}{4}\] days; *B*, *C* and *D* in 14 days; *C*, *D* and *A* in 18 days; *D*, *A* and *B* in 21 days. In what time can *A*, *B*, *C* and *D* together reap it?

*A* and *B* can polish the floors of a building in 10 days. A alone can do \[\frac{1}{4}\] th of it in 12 days. In how many days can *B* alone polish the floor ?

*A* and *B* can finish a work in 20 days. A alone can do \[\frac{1}{5}\] th of the work in 12 days. In how many days can *B* alone do it?

*A* and *B* can do a piece of work in 20 days and *B* in 15 days. They work together for 2 days and then *A* goes away. In how many days will *B* finish the remaining work?

*A* can do a piece of work in 40 days and *B* in 45 days. They work together for 10 days and then *B* goes away. In how many days will *A* finish the remaining work?

Aasheesh can paint his doll in 20 minutes and his sister Chinki can do so in 25 minutes. They paint the doll together for five minutes. At this juncture they have a quarrel and Chinki withdraws from painting. In how many minutes will Aasheesh finish the painting of the remaining doll?

*A* and *B* can do a piece of work in 6 days and 4 days respectively. A started the work; worked at it for 2 days and then was joined by *B*. Find the total time taken to complete the work.

6 men can complete the electric fitting in a building in 7 days. How many days will it take if 21 men do the job?

8 men can do a piece of work in 9 days. In how many days will 6 men do it?

Reema weaves 35 baskets in 25 days. In how many days will she weave 55 baskets?

Neha types 75 pages in 14 hours. How many pages will she type in 20 hours?

If 12 boys earn Rs 840 in 7 days, what will 15 boys earn in 6 days?

If 25 men earn Rs 1000 in 10 days, how much will 15 men earn in 15 days?

Working 8 hours a day, Ashu can copy a book in 18 days. How many hours a day should he work so as to finish the work in 12 days?

If 9 girls can prepare 135 garlands in 3 hours, how many girls are needed to prepare 270 garlands in 1 hour?

A cistern can be filled by one tap in 8 hours, and by another in 4 hours. How long will it take to fill the cistern if both taps are opened together?

Two taps *A* and *B* can fill an overhead tank in 10 hours and 15 hours respectively. Both the taps are opened for 4 hours and they *B* is turned off. How much time will *A* take to fill the remaining tank?

A pipe can fill a cistern in 10 hours. Due to a leak in the bottom it is filled in 12 hours. When the cistern is full, in how much time will it be emptied by the leak?

A cistern has two inlets *A* and *B* which can fill it in 12 hours and 15 hours respectively. An outlet can empty the full cistern in 10 hours. If all the three pipes are opened together in the empty cistern, how much time will they take to fill the cistern completely?

A cistern can be filled by a tap in 4 hours and emptied by an outlet pipe in 6 hours. How long will it take to fill the cistern if both the tap and the pipe are opened together?

## Chapter 11: Time and Work

#### RD Sharma Mathematics Class 8 by R D Sharma (2019-2020 Session)

#### Textbook solutions for Class 8

## RD Sharma solutions for Class 8 Mathematics chapter 11 - Time and Work

RD Sharma solutions for Class 8 Maths chapter 11 (Time and Work) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Mathematics for Class 8 by R D Sharma (2019-2020 Session) solutions in a manner that help students grasp basic concepts better and faster.

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Concepts covered in Class 8 Mathematics chapter 11 Time and Work are Concept of Direct Proportion, Concept of Inverse Proportion, Time and Work.

Using RD Sharma Class 8 solutions Time and Work exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in RD Sharma Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 8 prefer RD Sharma Textbook Solutions to score more in exam.

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