The efficiencies of two taps are in the ratio 4:7. If the second tap t – McqOptions

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1.	The efficiencies of two taps are in the ratio 4:7. If the second tap takes 30 minutes less to fill the tank than the first, then in how much time will both the taps fill the tank?
A.	12/128
B.	89/234
C.	11/280
D.	45/238
Answer» D. 45/238

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