Question

A can build a room in 50 days. A and B together can build a room in 25 days. They worked
together for 15 days and then B goes away. In how many days will A finish the remaining work?​

Answer 1

Answer: 20 days.

Step-by-step explanation:

A's speed is = 1/50

B's speed is = 1/25-1/50 = 1/50

∴When they worked together for one day⇒1/50+1/50=2/50

So , When they worked together for 15 days work done = 15(2/50)=30/50

Work done = 30/50

Work left = 20/50

A's speed=1/50......So,A will complete the work in (20/50)/1/50 = 20 days

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Answer 2

Step-by-step explanation:

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