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Question

A works twice as fast as B. They work together and complete a job in 8 days. How long would A take to complete the job?

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Solution

Ratio of Rate of working of A & B = 2:1
Ratio of time taken is = 1:2
Let x day taken by A.
So,;2 day taken to work (1x)th
and 2x day by B
1 day (12x)th
1 day 1x+12x=32x
8 day 8×32x
8×32x=1
x=12 day


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