Question

12 men working 15 hours a day can finish a work in 5 days. In how many days
the same work will be done by 9 men working 10 hours a day?​

Answer 1

Working 8 hrs in a day men needed =12

⇒ Working 1 hr in 1 day men needed =12×8×10

⇒ Working 15 hrs in 8 days men needed =

15×8

12×8×10

=8

∴ Men needed =8.

Hence, the answer is 8.

Answer 2

Answer:

10 days

Step-by-step explanation:

Given,

12 men working

15 hours per day can do a work in 5 days.

To find,

Same work will be done by 9 working 10 hours a day

Solution,

Find the total work unit use,

work unit= No. of men doing the work × No. of hours × No. of days

then find the no. of days

So, the total work units = 12 x 15 x 5 = 900

So, 12 men working at 15 hours per day can do 900 units of work in 5 days.

Therefore, No. of days required by 9 men, working at 10 hours per day

= 900/10 x 9

= 10

So,

9 men working at 10 hours per day do the same work In 10 days.

#SPJ2