Advertisements
Advertisements
Question
Mrs. Kaushik has a square plot with the measurement as shown in the following figure. She wants to construct a house in the middle of the plot. A garden is developed around the house. Find the total cost of developing a garden around the house at the rate of Rs 55 per m2.
Advertisements
Solution
Area of the square plot = (25 m)2 = 625 m2
Area of the house = (15 m) × (20 m) =300 m2
Area of the remaining portion = Area of square plot − Area of the house
= 625 m2 − 300 m2 = 325 m2
The cost of developing the garden around the house is Rs 55 per m2.
Total cost of developing the garden of area 325 m2 = Rs (55 × 325)
= Rs 17,875
APPEARS IN
RELATED QUESTIONS
A plot is in the form of a rectangle ABCD having semi-circle on BC as shown in Fig. 20.23. If AB = 60 m and BC = 28 m, find the area of the plot.
A playground has the shape of a rectangle, with two semi-circles on its smaller sides as diameters, added to its outside. If the sides of the rectangle are 36 m and 24.5 m, find the area of the playground. (Take π = 22/7).
A rectangular piece is 20 m long and 15 m wide. From its four corners, quadrants of radii 3.5 m have been cut. Find the area of the remaining part.
Find the area of Fig. 20.25, in square cm, correct to one place of decimal. (Take π = 22/7)
The diameter of a wheel of a bus is 90 cm which makes 315 revolutions per minute. Determine its speed in kilometres per hour. [Use π = 22/7]
The length and breadth of the rectangular piece of land area in the ratio of 5 : 3. If the total cost of fencing it at the rate of ₹48 per metre is ₹19,200, find its length and breadth.
The area of a parallelogram is 60 cm2 and one of its altitudes is 5 cm. The length of its corresponding side is ______.
The perimeter of a rectangle becomes ______ times its original perimeter, if its length and breadth are doubled.
The length of an aluminium strip is 40 cm. If the lengths in cm are measured in natural numbers, write the measurement of all the possible rectangular frames which can be made out of it. (For example, a rectangular frame with 15 cm length and 5 cm breadth can be made from this strip.)
Which of the following is an example of a closed figure?
