MBA Exam

There are 2 inlet taps of diameter 1 cm and 3 cm and an outlet tap of diameter 2 cm. The rate of flow of water is directly proportional to the square of the diameter. It would take 11 minutes for the pipe of diameter 2 cm to fill an empty tank. Find the time taken to fill an empty tank when all the taps are opened.

1) 7 minutes
2) 7.33 minutes
3) 7.66 minutes
4) 8 minutes

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MBA Other Question
11( upto 5 digits) is written in base n .. For how many values of n is this number a perfect square ?

1) 2
2) 0
3) 1
4) more than 2
 in how many ways a boy can paint a CUBE with 6 different colour 

1) 20
2) 120
3) 57
4) 65
5) please expln.