1.

*/*_A tank is 7 metre long and 4 meter wide wide. At what speed should water run through a pipe 5 cm broad and 4 cm deep so that in 6 hours and 18 minutes water level in the tank rises by 4.5 meter??

A. 10 km/hr
B. 12 km/hr
C. 8 km/hr
D. None of these
Answer» B. 12 km/hr


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