A and B take 6 hours and 9 hours respectively to complete a work .A wo

1.	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» 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

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»

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

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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?​

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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?