Once you attempt the question then PrepInsta explanation will be displayed.
Work done by X in 4 days =[1/20 * 4] = 1/5
Remaining work =[1-1/5] = 4/5
(X+Y)’s 1 days work= [1/20 + 1/12]
= 8/60= 2/15
Now, 2/15 work is done by X and Y in 1 day.
So, 4/5 work will be done by
X and Y in [15/2 * 4/5] = 6 days
Hence, total time taken = (6 + 4) days
= 10 days
please provide the solution to the above questions.