Please 7th sum with steps I will mark as brainlist
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B completes whole work in 30 hours.
If both work together
(20 X 30)/50=12
Both will together complete in 12 hours. But they only work 6 hours. So they can complete only 50% of the work or
Work done by them in 6 hour = 6/12=1/2
If both work together
(20 X 30)/50=12
Both will together complete in 12 hours. But they only work 6 hours. So they can complete only 50% of the work or
Work done by them in 6 hour = 6/12=1/2
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