Swimming pool 6

We open the first pipe and, after two hours, open the second pipe without closing the first. The swimming pool will be filled with both pipes in four hours. If we open the first pipe itself, it will fill the pool 1.5 times faster than the second pipe. How many hours will each pipe take to fill the pool?

Correct answer:

a =  5.3333 h
b =  8 h

Step-by-step explanation:

4/a + 2/b=1 1.5 a = b  4/a + 2/(1.5 a)=1  a=4+2/1.5=5.3333 h
b=1.5 a=1.5 5.3333=8 h



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