A can do a piece of work in 12 days. B can do this work in 16 days. A started the work alone. After how many days should B join him, so that the work is finished in 9 days?
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Answered by
6
Answer:
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your answer is here !
Step-by-step explanation:
A's work in 9 days = 9/12 = 3/4.
Remaining work = 1/4.
This work was done by B in 1/4 × 16 = 4 days.
∴ B would have joined A after 9 – 4 = 5 days.
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Answered by
1
Answer:
work in 9days=>9/12=>3/4
Remaining work=>1/
work done by B=>1/4 x16=>4days
=>9-4=>5days
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