Raju can finish a piece of work in 20 days. He worked at it for 5 days and then Jakob alone finished the remaining work in 15 days. In how many days can both finish it together?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e 10 days
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Understanding Tricks |
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Application Let total work = 20unit So the efficiency of Raju = 1 unit/day When Raju worked for 5 days Remaining work = 15 unit and Jakob finished it in 15 days So The efficiency of Jakob = 1 unit/day |
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Now The efficiency of both together = 1 + 1 = 2 unit So The time 20/2 = 10 days |