Q.46 The wheel of the car with diameter 50 cm makes 576 revolutions per minute. The speed of the car must be…….
(A) 53.4 km/ph
(B) 46.5 km/ph
(C) 35.4 km/ph
(D) 64.3 km/ph
Q.47 A walked from Bombay to Thane on foot. Had he walked one mph faster, he would have reached 2 ½ hrs. earlier; but if he had walked slower by 1 mph, he would have taken 5 hrs. more. The distance between Bombay and Thane is……
(A) 60 miles
(B) 40 miles
(C) 10 miles
(D) none of these
Q.48 Walking at ¾th of its usual speed, a man is 1 ½ hrs. late. Find his usual travel time.
(A) 6 hrs.
(B) 4 hrs.
(C) 4 ½ hrs.
(D) none of these
Q.49 A boats crew can row a 4 miles course in 20 min. in still water and in 16 min. with the tide. How long will it take to row the course against the tide?
(A) 30 min.
(B) 25 min.
(C) 80/3 min
(D) 160/3
Q.50 A boat can be rowed 6 km/hrs. along the current and 4 km/hrs. against the current. Find the speed of the current.
(A) 1 km/ph
(B) 2 km/ph
(C) 5 km/ph
(D) none of these
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