Question
Download Solution PDFJehangir had to cover a distance of 90 km in an hour. During the first 25 minutes he travelled at a speed of 15.2 metres per second. How many metres did Jehangir cover per second during the remaining period to reach his destination just on time?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven data:
Total distance = 90 km = 90000 metres
Total time = 1 hour = 3600 seconds
Time spent travelling at 15.2 m/s = 25 minutes = 1500 seconds
Speed during first 25 minutes = 15.2 m/s
Concept to be used:
Distance = Speed × Time
Solution:
Distance covered in first 25 minutes = Speed × Time
⇒ 15.2 m/s × 1500 s = 22800 metres
Remaining distance to be covered = Total distance - Distance covered in first 25 min
⇒ 90000 m - 22800 m = 67200 metres
Remaining time = Total time - Time spent in first 25 min
⇒ 3600 s - 1500 s = 2100 seconds
Speed during remaining time = Remaining distance / Remaining time
⇒ 67200 m / 2100 s = 32 m/s
Therefore, Jehangir should travel at a speed of 32 m/s for the remaining time to reach his destination on time.
Last updated on Jul 7, 2025
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