Advertisements
Advertisements
Question
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?
Advertisements
Solution
\[\text{ It is given that 6 men can complete a job in 7 days } . \]
\[ \therefore \text{ Time taken by 1 man to complete the same job } = \left( 6 \times 7 \right) = 42 \text{ days } \]
\[ \therefore \text{ Time taken by 21 men to complete the same job } = \frac{42}{21} = 2 \text { days } \]
APPEARS IN
RELATED QUESTIONS
Fill in the blank in of the following so as to make the statement true:
x and y are said to vary directly with each other if for some positive number k ....,...... = k.
11 men can dig \[6\frac{3}{4}\] metre long trench in one day. How many men should be employed for digging 27 metre long trench of the same type in one day?
Rakesh can do a piece of work in 20 days. How much work can he do in 4 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?
Both u and v vary directly with each other. When u is 10, v is 15, which of the following is not a possible pair of corresponding values of u and v?
Length of a side of a square and its area vary directly with each other.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
The quantity of rice and its cost.
It is given that l varies directly as m. Find the constant of proportion (k), when l is 6 then m is 18.
Campus and Welfare Committee of school is planning to develop a blue shade for painting the entire school building. For this purpose various shades are tried by mixing containers of blue paint and white paint. In the following mixtures, decide which is a lighter shade of blue and also find the lightest blue shade among all of them.
| Mixture G | Mixture H |
 |
 |
If one container has one litre paint and the building requires 105 litres for painting, how many container of each type is required to paint the building by darkest blue shade?
Shabnam takes 20 minutes to reach her school if she goes at a speed of 6 km/h. If she wants to reach school in 24 minutes, what should be her speed?
