Practice MCQ Questions and Answer on Speed Time and Distance
21.
A soldier fired two bullets at an interval of 335 seconds moving at a uniform speed V1. A terrorist who was running ahead of the soldier in same direction, hears the two shots at an interval of 330 seconds. If the speed of sound is 1188 km/h, then who is the faster and how much?
- (A) Soldier, 22 km/h
- (B) Terrorist, 25 km/h
- (C) Soldier, 18 km/h
- (D) Terrorist, 20 km/h
22.
Two boats A and B start towards each other from two places, 108 km apart. Speed of the boats A and B in still water are 12 km/h and 15 km/h respectively. If A proceeds down and B up the stream, they will meet after:
- (A) 4.5 hours
- (B) 4 hours
- (C) 5.4 hours
- (D) 6 hours
23.
Two trains start from stations A and B and travel towards each other at a speed of 50 kmph and 60 kmph respectively. A the time of their meeting, the second train had travelled 120 km more then the first. The distance between A and B is :
- (A) 600 km
- (B) 1320 km
- (C) 1440 km
- (D) 1660 km
24.
Two trains are running with speed 30 km/hr and 58 km/hr in the same direction, a man in the slower train passes the faster train in 18 sec. The length (in metres) of the faster train is :
- (A) 70 metres
- (B) 100 metres
- (C) 128 metres
- (D) 140 metres
25.
Ashok left from place A for place B at 8 am and Rahul left place B for place A at 10.00 am the distance between place A and B is 637 km. If Ashok and Rahul are travelling at a uniform speed of 39 kmph and 47 kmph respectively, at what time will they meet ?
- (A) 5.30 pm
- (B) 4.30 pm
- (C) 5 pm
- (D) 4 pm
26.
A car travelling with $$\frac{5}{7}$$ of its usual speed covers 42 km in 1 hr 40 min 48 sec. What is the usual speed of the car ?
- (A) $$17\frac{6}{7}$$ km/hr
- (B) 35 km/hr
- (C) 25 km/hr
- (D) 30 km/hr
27.
A person travels three equal distance at a speed of x km/hr, y km/hr and z km/hr respectively. What is the average speed for the whole journey ?
- (A) $$\frac{{xyz}}{{3\left( {xy + yz + zx} \right)}}$$ km/hr
- (B) $$\frac{{xyz}}{{\left( {xy + yz + zx} \right)}}$$ km/hr
- (C) $$\frac{{\left( {xy + yz + zx} \right)}}{{xyz}}$$ km/hr
- (D) $$\frac{{3xyz}}{{\left( {xy + yz + zx} \right)}}$$ km/hr
28.
Two persons A and B started from two different places towards each other. If the ratio of their speed be 3 : 5, then what is the ratio of distance covered by A and B respectively till the point of meeting?
- (A) 1 : 2
- (B) 3 : 4
- (C) 3 : 5
- (D) 5 : 3
29.
Two cars are moving with speed v1, v2 towards a crossing along two roads, If their distance from the crossing be 40 metres and 50 metres at an instant of time then they do not collide if their speeds are such that :
- (A) v1 : v2 $$ = $$ 16 : 25
- (B) v1 : v2 $$ \ne $$ 4 : 5
- (C) v1 : v2 $$ \ne $$ 5 : 4
- (D) v1 : v2 $$ \ne $$ 25 : 16
30.
A man can cross a downstream river by steamer in 40 minutes and same by boat in 1 hour. If the time of crossing Upstream by streamer is 50% more than downstream time by steamer and the time required by boat to cross same river by boat in upstream is 50% more than time required by in downstream. What is the time taken for the man to cross the river downstream by steamer and then return to same place by boat half the way and by steamer the rest of the way?
- (A) 85 minutes
- (B) 115 minutes
- (C) 120 minutes
- (D) 125 minutes