14m
10m
7m
5m
Correct answer is C
Volume of a cylinder = πr2h
385 = 227 x r2 x 10
385 x 7 = 22 x r2 x 10
r2 = 385×722×10
= 12.25
r = √12.25
= 3.5m
Hence, diameter of tank = 2r
= 2 x 3.5 = 7m
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