Advertisements
Advertisements
Question
Fifteen men can build a wall in 60 days. How many more men are required to build another wall of the same size in 45 days?
Advertisements
Solution
In 60 days a wall can be built by = 15 men
In 1 day a wall can be built by = 15 x 60 men
In 45 days a wall can be built by = `(15xx60)/45=900/45` = 20 men
No. of more men required to build the wall in 45 days = 20 – 15 = 5 men
APPEARS IN
RELATED QUESTIONS
`3/5` quintal of wheat costs Rs.210. Find the cost of :
(i) 1 quintal of wheat
(ii) 0.4 quintal of wheat
A contractor undertakes to build a wall 1000 m long in 50 days. He employs 56 men, but at the end of 27 days, he finds that only 448 m of wall is built. How many extra men must the contractor employ so that the wall is completed in time?
A group of labourers promises to do a piece of work in 10 days, but five of them become absent. If the remaining labourers complete the work in 12 days, find their original number in the group.
A motorbike travels 330 km in 5 litres of petrol. How much distance will it cover in 2.5 litres of petrol?
The cost of 35 envelops is ₹ 105. How many envelops can be bought for ₹ 90?
Weight of 15 books is 6 kg. What is the weight of 45 such books?
If John walks 250 steps to cover a distance of 200 metres, find the distance covered by him in 350 steps
25 metres of cloth costs ₹ 1,012.50. How many metres of the same kind can be bought for ₹ 1,620?
In the unitary method, which mathematical operation is used to convert the value of "many" units to the value of "one" unit?
If 18 pencils cost ₹54, what is the cost of 6 pencils?
