A man covers a distance of 24 km in 3 hours. If he doubles his speed, how much time will he take to cover a distance of 32 km? MCQ with Answer and Explanation

A man covers a distance of 24 km in 3 hours. If he doubles his speed, how much time will he take to cover a distance of 32 km?
A. 1 hour
B. 2 hours
C. 4 hours
D. 3 hours
Answer: Option B
Solution (By JKSSB Mock Tests)
Original speed = 24 / 3 = 8 km/h. Doubled speed = 16 km/h. Time required for 32 km = 32 / 16 = 2 hours.

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Practice More Time Speed and Distance Questions

Question #1
A baseline boat hull can row 12 km/h in still water. If the river current tracks a velocity of 4 km/h, find the exact sector distance covered downstream by the boat hull in 45 minutes flat.
A. 14 km
B. 16 km
C. 10 km
D. 12 km

Correct Answer: Option D


Explanation:
Downstream speed = 12 + 4 = 16 km/h. Time = 45 minutes = 45/60 = 0.75 hours = 3/4 hour. Distance covered = Speed * Time = 16 * (3/4) = 12 km.

This question belongs to: Maths Time Speed and Distance
Question #2
A passenger train 100 meters long clears a line worker tracking on the ballast track in 5 seconds flat when both move along the identical direction. If the line worker walks at 8 km/h, find the train speed.
A. 84 km/h
B. 76 km/h
C. 88 km/h
D. 80 km/h

Correct Answer: Option D


Explanation:
Relative tracking speed = 100 / 5 = 20 m/s = 20 * (18/5) = 72 km/h. In identical directions, Relative Speed = Speed of train - Speed of worker => 72 = Speed of train - 8 => Speed of train = 80 km/h.

This question belongs to: Maths Time Speed and Distance
Question #3
A train 100 meters long passes a platform 400 meters long in 25 seconds. Find the speed of the train in km/h.
A. 60 km/h
B. 90 km/h
C. 80 km/h
D. 72 km/h

Correct Answer: Option D


Explanation:
Total distance = 100 + 400 = 500 meters. Speed = 500 / 25 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance