Question 103

Two persons A and B can complete a piece of work in 10 days and 20 days respectively. Together, they start working on the project, but A left after 4 days. How long more will B take to complete the project?

Solution

Let the total work be 200 units.
A’s rate of work = 200 units/10 days = 20 units per day
B’s rate of work = 200 units/20 days = 10 units per day
So, work done by A and B together in 4 days = (20+10)*4 = 120 units
Work left = 200 - 120 = 80 units
Time taken by B to complete the remaining work = 80 units/10 units per day = 8 days

View More Questions From Speed Time Distance Work

Create a FREE account and get:

  • Download Maths Shortcuts PDF
  • Get 300+ previous papers with solutions PDF
  • 500+ Online Tests for Free