Question

One men can do a piece of work in 3 gour ; Another can do the Same piece of work in 2 hours.How long will they take if they work together?plz give me answer
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Answer 1

Step-by-step explanation:

In 3 hrs ‘A’ completes 1 piece of work

=> in 1 hr ‘A' does 1/3 work . . . . . . . .(1)

In 2 hrs ‘B' completes 1 piece of work

=> in 1 hr ‘B' does 1/2 work . . . . . . . .(2)

So, together A & B complete (1/3 + 1/2) work in 1 hr.

= 5/6 work in 1 hr

So, 1 piece of work in 1÷ 5/6 = 6/5 hrs = 1&1/5

Since 1 hr = 60 minutes

=> 1/5 hr = 60/5 = 12 min

So together A & B complete the piece of work in 1 hr 12 min