A can do a work in 20 days and B can do the work in 15 days How - Maths - Linear Equations in Two Variables

Question

A can do a work in 20 days and B can do the work in 15 days How
much fraction of work will left if they do it together for 4 days?

Varun Rawat · Accepted Answer

A can complete the work in 20 days
So, A' s 1 day's work = 120B can complete the work in 15  days
So, B' s 1 day's work = 115A+B's 1 day's work = 120 + 115 = 3 + 460 = 760Now, A+B's 4 days'  work = 4 × 760 = 715Now, fraction of work left = 1 - 715 = 815

A can do a work in 20 days and B can do the work in 15 days . How much fraction of work will left if they do it together for 4 days?