A does 20% less work than B. If A can finish a piece of work in 7 hours, then B can finish it in
Number of hours taken by A to finish the work = hours =
hours
Work done by A in one hour :
Let number of hours taken by B to finish the work :
A can work 20% less than B that is =
times of B’s work.
Here , : 1 =
:
=
X = = 6 hours.