Solve question no 13 in details
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Answer:
4 days
Step-by-step explanation:
If Ravi, Suman and Sonakshi can do a piece of work in 15, 12 and 20 days respectively, each of them will be able to do 1/15 , 1/12, 1/20 of the work in 1 day respectively.
So, together they will be able to do 1/5 (1/15 + 1/12 + 1/20)of the work every day together.
After 2 days, 2/5 of the work would be done.
Since Sonakshi left, Ravi and Suman will be able to do 3/20 of the work in one day together.
Now, divide the remaining work with the work done in one day by Ravi and Suman
3/5 divide by 3/20 = 4 Days
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