1.
A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?
A. 3.6 B. 7.2
C. 8.4 D. 10
Answer & Explanation
Answer: Option B
Explanation:
Speed = 600 m/sec.
5 x 60
= 2 m/sec.
Converting m/sec to km/hr (see important formulas section)
= 2 x 18 km/hr
5
= 7.2 km/hr.
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2.
An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1 hours, it must travel at a speed of:
A. 300 kmph B. 360 kmph
C. 600 kmph D. 720 kmph
Answer & Explanation
Answer: Option D
Explanation:
Distance = (240 x 5) = 1200 km.
Speed = Distance/Time
Speed = 1200/(5/3) km/hr. [We can write 1 hours as 5/3 hours]
Required speed = 1200 x 3 km/hr = 720 km/hr.
5
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3.
If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:
A. 50 km B. 56 km
C. 70 km D. 80 km
Answer & Explanation
Answer: Option A
Explanation:
Let the actual distance travelled be x km.
Then, x = x + 20
10 14
14x = 10x + 200
4x = 200
x = 50 km.
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4.
A train can travel 50% faster than a car. Both start from point A at the same time and reach point B 75 kms away from A at the same time. On the way, however, the train lost about 12.5 minutes while stopping at the stations. The speed of the car is:
A. 100 kmph B. 110 kmph
C. 120 kmph D. 130 kmph
Answer & Explanation
Answer: Option C
Explanation:
Let speed of the car be x kmph.
Then, speed of the train = 150 x = 3 x kmph.
100 2
75 – 75 = 125
x (3/2)x 10 x 60
75 – 50 = 5
x x 24
x = 25 x24 = 120 kmph.
5
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5.
Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?
A. 9 B. 10
C. 12 D. 20
Answer & Explanation
Answer: Option B
Explanation:
Due to stoppages, it covers 9 km less.
Time taken to cover 9 km = 9 x 60 min = 10 min.
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