Question
Sohan completes half the work done by Ramesh in 3/4 of
the time. If they together can complete the work in 20 days, how much time will Ramesh take to complete the work?Solution
ATQ,
Let time taken by Ramesh to complete the work = t days
Sohan takes 2 × (3t/4) = 6t/4 = 3t/2 days.
Efficiency of Ramesh = 1/t,
Efficiency of Sohan = 2/3t.
Total efficiency = 1/t + 2/3t = 1/20 
Solving for t, we get t = 30 days.
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