Question

If 15 men can do a piece of work in 24 days , how long will 9 men take to do the same work.​

Answer 1

Given

15 men can do a piece of work in 24 days.

To Find

in how many days 9 men take to do work

$\sf\huge\bold{\underline{\underline{{Solution}}}}$

15 men can do work in 24 days

then 30 men can do work in 12 days

Then 10 men can do work in 12×3=36 days

Similarly 5 men can do work in =36×2=72 days.

Since ,10 men takes 36 days to do work

then,1 men can do work in =36×10=360 days

so, 9 men will take days to do work =360/9=40 days.

∴ 9 men take 40 days to do work

Concept

• More the number of men less the number of days to do a work and similarly less the number of men more the number of days to do work.
• Second thing is ratio , Days and work should be calculate on ratio basis.