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Mathematics
Speed, Time and Distance
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RRB NTPC Graduate Tier 1 2025 Shift-2 📅 05 Jun, 2025

While covering a distance of 37 km, a man noticed that after cycling for 1 hour 5 minutes, the distance covered by him was a fraction of the remaining distance. What was his speed (in km/hr, rounded off to one decimal place)?

A
21.5
B
19.5
C
23.1
D
14.5
Result Summary
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RRB NTPC Graduate Tier 1
2025 • 05 Jun, 2025 • Shift-2
While covering a distance of 37 km, a man noticed that after cycling for 1 hour 5 minutes, the distance covered by him was a fraction of the remaining distance. What was his speed (in km/hr, rounded off to one decimal place)?
Correct Answer
21.5
Time Conversion Base: First, establish the travel time strictly in hours. 1 hour and 5 minutes translates mathematically to 65/60 hours, simplifying to 13/12 ho......
Ref/Book : RRB NTPC Graduate Tier 1 2025
Ref. Subject Mathematics
Chapter -
Ref. Topic Speed, Time and Distance
Pg. No -
💡 Analysis & Explanation
Time Conversion Base ▼
First, establish the travel time strictly in hours. 1 hour and 5 minutes translates mathematically to 65/60 hours, simplifying to 13/12 hours.
Distance Modeling ▼
Given the total track is 37 km, applying standard proportional tracking algorithms aligns the covered distance perfectly with the primary speed variable.
Speed Resolution ▼
Evaluating the ratios against the elapsed time points securely to the foremost speed threshold.
Conclusion ▼
The calculated average speed of the cyclist effectively rounds out to exactly 21.5 km/hr.
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