1.

Efficiency of Q is two times more than efficiency of P. Both started working alternatively, starting with Q and completed the work in total 35 days. If R alone complete the same work in 48 days then find in how many days P and R together will complete the work?

Answer»

24 days
28 days
36 days
27 days

Solution :Lets dfficiency of P is X unit/ day and Q's efficiency
is 3x unit/day
So, Q WORK for 18 days and P work for 17 days
ATQ-
Total work `=18 XX 3x=17xx x=71x`
Efficiency of `R = (71x)/48 = 1.47x =1.5 x ` unit/ day
(P + R) together `=(71x)/(x+1.5x) = 28` days (approx)


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