exam Maths Puzzle

Jay started cycling along the boundaries of a square field from corner point A. After half an hour he reached the corner point C, diagonally opposite to A. If his speed was 8km/hr, the area of the filed in square km is:

A.

64

B.

16

C.

9

D.

4

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exam Other Question

In a race, the speeds of A and B are in the ratio 3:4. A takes 30 minutes more than B to reach the destination. The time taken by A to reach the destination is:

A.

1 hr

B.

1.5 hr

C.

2 hr

D.

2.5 hr Wheel of diameter 7cm and 14 cm start rolling simultaneously from X and Y which are 1980cm apart towards each other in opposite directions. Both of them make same number of revolutions per second. If both of them meet after 10s, the speed of the smaller wheel is:

A.

22 cm/s

B.

44 cm/s

C.

66 cm/s

D.

88 cm/s