Wipro Company Numerical Ability Time Distance and Speed

A car travels 120 km from A to B at 30 km/hour but returns the same distance at 40 km/hour. The average speed for the round trip is closest to:
A. 36 km/hour
B. 35 km/hour
C. 34 km/hour
D. 33 km/hour
E. None of these

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Wipro Other Question

The average monthly salary of all employees in a factory is $600 and that of 16 officers is $3000. If the average monthly salary of workers is $550, the number of workers, leaving aside officers, in the factory is
A. 744
B. 768
C. 842
D. 802
E. None of these
It rained as much as on Wednesday as on all the other days of the week combined. If the average rainfall for the whole week was 3 cms; how much did it rain on Wednesday?
A. 3 cms
B. 10.5 cms
C. 15 cms
D. 2.62 cms
E. 4.5 cms