Mohit and Rohit paint over lenses de Rohit and Ashwini in a day and Ashwini and Mohit into a day how much time will Rohit alone take to finish the work
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Step-by-step explanation:
M + R : 12 days.
R + A : 15 days.
A + M : 20 days.
L.C.M of 12, 15, 20 is 60.
Now the above relations will become:
M + R : 5 days.
R + A : 4 days.
A + M : 3 days.
2(M + R + A) = 12 days.
=> M + R + A = 6 days.
But, M + A = 3 days.
Therefore, R = 6 - 3 = 2 days.
Therefore, Rohit (represented as R) alone can finish the work in 60/2 = 30 days.
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