Question

amar and vijay together can do a piece of work in 10 days. but amar alone can do it in 15 days. how many days would vijay alone take to do the same work?

Answer 1

(Amar+Vijay)'s 1st day work = 1/10
Amar's 1st days work = 1/15
so,Vijay's 1st day work = (1/10)-(1/15)
= 1/30
so Vijjay alone can do work in 1/(1/30) = 30 days

Answer 2

Answer:

Step-by-step explanation:

Amar alone - 15 days

1 day - 1/15 of work

Both together - 10 days

1 day - 1/10 of the work

Vijay alone - (1/10 - 1/15)^-1

= (5/150)^-1

= 30 days