Question

20 men takes 52 days to build a wall. How many more men are required to build a
wall, triple in size, in 60 days?​

Answer 1

Answer:

So, the motorists have to reduce the consumption of petrol by 9.09 %, so that the expenditure on it remains unchanged

Answer 2

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Let x men are required to build the wall in 60 days.

Then x = 20 : 52 : 60

⇒ 60x = 20 × 52

⇒20 × 52 / 60

x = 17 men