A car covered a distance of 240 km in 4 hours. If it decreases its speed by 10 km/h, how much time will it take to cover a distance of 300 km? MCQ with Answer and Explanation

A car covered a distance of 240 km in 4 hours. If it decreases its speed by 10 km/h, how much time will it take to cover a distance of 300 km?
A. 6 hours
B. 6.5 hours
C. 5 hours
D. 5.5 hours
Answer: Option A
Solution (By JKSSB Mock Tests)
Original speed = 240 / 4 = 60 km/h. New speed = 60 - 10 = 50 km/h. Time for 300 km = 300 / 50 = 6 hours.

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Practice More Time Speed and Distance Questions

Question #1
A commuter sets a pace of 4 km/h and reaches his branch office 10 minutes late. If he increases his pace to 6 km/h, he still reaches 2 minutes late. Find the distance.
A. 1.4 km
B. 2.0 km
C. 1.8 km
D. 1.6 km

Correct Answer: Option D


Explanation:
Time difference = 10 - 2 = 8 minutes = 8/60 = 2/15 hours. Let distance be d. d/4 - d/6 = 2/15 => d/12 = 2/15 => d = 24/15 = 1.6 km.

This question belongs to: Maths Time Speed and Distance
Question #2
A train running at 72 km/h overtakes a cyclist riding at 12 km/h in the same direction in 12 seconds. Find the length of the train.
A. 200 meters
B. 240 meters
C. 220 meters
D. 180 meters

Correct Answer: Option A


Explanation:
Relative speed = 72 - 12 = 60 km/h = 60 * (5/18) = 50/3 m/s. Length of train = Relative speed * Time = (50/3) * 12 = 200 meters.

This question belongs to: Maths Time Speed and Distance
Question #3
A luxury car handles a tracking route sector of 240 km. It finishes the first half segment stretch at 40 km/h and the second half sector at 60 km/h. Find the mean average speed recorded across the full route.
A. 48 km/h
B. 50 km/h
C. 52 km/h
D. 46 km/h

Correct Answer: Option A


Explanation:
Average Speed across sectors = 2xy / (x + y) = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.

This question belongs to: Maths Time Speed and Distance