Question

A piece of work which could be finished in 9 days was finished 3 days earlier after
10 more men joined .The number of men employed was
(a) 18
(b) 20
(c) 22
(d) 24

Answer 1

let number of men be x
then can finish it in 9 days
let number of men be x+10
number of days be 6
answer will be 20 men b part