question_answer

If it takes 5 minutes to fill a 15 litre bucket from a water tap of diameter\[\frac{2}{\sqrt{\pi }}cm\]then the Reynolds number for the flow is (density of water \[={{10}^{3}}kg/{{m}^{3}}\]and viscosity of water \[={{10}^{-3}}Pa.s\]) close to:                 [JEE ONLINE 10-04-2015]

A)  11,000

B)       5500

C)  550                 

D)       1100

Correct Answer: B

Solution :

[b] Time = 5 min = 300 sec.

Volume

Diameter

Area of tap

Velocity of water