Water flows into a pipe of diameter 7 cm at 20 km/hr and exits through – McqOptions

MCQOPTIONS

1.	Water flows into a pipe of diameter 7 cm at 20 km/hr and exits through 'n' number of holes each of diameter 1 cm from the other end at 70 km/hr. Find 'n'.
A.	14
B.	7
C.	21
D.	28
Answer» B. 7

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