MBA Exam

A train overtakes two persons walking at 2 and 4 kms per hour respectively and completely passes them respectively in 9 seconds and 10 seconds. what is the length of the train and its speed in km/hr ?

1) 50 m, 22 kmph
2) 40 m, 18 kmph
3) 60 m, 30 kmph
4) 70 m, 10 kmph

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MBA Other Question
The salaries of 30 employees of a company are increased by 10% and that of the remaining 20 employees of the same company are increased by 20%.what is the per. increase in the total salary of 50 employees?pl.provide sol.

1) 15%
2) 26%
3) 14%
4) cannot be determined
 f(x) = max ( x^2-4,x,-1)find min f(x)

1) 1
2) -1
3) root3
4) none of these