Question

A and B take 6 hours and 9 hours respectively to complete a work .A works for 1 hour and then B works for two hours.
1. How much work is done in these 3 hours?
How much work is still left?​

Answer 1

work %of a in 1 hour

100%÷6

whil work done by b in 3 hours will be

-100×2÷9

so work done by them in 3 hrs will be

work of à + work of b

so.

100%÷6 + 100×2÷9

=38.888...

(100-38.8...)

61.111112- is the amount of work that is remaining