Question

If 18 men do a work in 15 days. In how many days will 60 men complete
twice the work?
(a) 18 days (b) 12 days (c) 9 days (d) 10 days
​

Answer 1

Given,

18 men do a work in 15 days.

To find,

in how many days 60 men will complete twice the work.

Solution,

We can simply solve this mathematical problem by using the following mathematical process.

Here, we have to apply normal arithmetic method.

18 men can do 1x amount work in = 15 days

1 man can do 1x amount of work in = 15 × 18 days

60 men can do 1x amount of work in = (15×18)/60 days

60 men can do 2x amount of work in = (15×18×2)/60 = 9 days

Hence, it will take 9 days.