Question

A can finish a work in 12 days and B can do it in 15 days. After A had worked for 3 days, B also joined A to finish the remaining work. In how many days the remaining work would be finished
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Answer 1

Answer:

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Answer 2

Answer:

5 days

Step-by-step explanation:

Let us Find the Work Rate (= W/Days/Time)

Now, Let us Assume x be the Number of Extra Days.

(i) for A= W/12

(ii) for B= W/15

⇒ W/12 (3+x) W/15x=W

⇒ 3+x/12 +x/15 =1

⇒ x=5