Question

X could complete a piece of work in 16 hours and Y could complete the same work in 20 hours they work together for 8 hours and then Y left find the time required by X to complete the remaining work alone.Please give step-by-step explanation.​

Answer 1

Answer:

1.6 hrs

Step-by-step explanation:

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work done by x in 1hr = 1/16

work done by y in 1hr = 1/20

work done by them together in 1hr = 1/16+1/20 = (5+4)/80 = 9/80

work done together in 8hrs = 8*9/80 = 9/10

leftover work = 10/10 - 9/10 = 1/10

time taken by x will be 1/10 / 1/16 = 16/10 = 1.6hrs

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