Question

18. If 7 boys can complete a job in 21days, how long will 21 boys take to complete the same work.

Answer 1

heyyaa bro your ans is here ⬇ ⬇

let's start :--


given that seven boys can complete a job in 21 days , .......

then one day work of seven boys = 1/21.


so ,one day work of 1 boy = 1 / (21×7)


now ..... 21 workers can finish the work in = 21/ (21×7) =

= 7 days. ...