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Mathematics
Speed, Time and Distance
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RRB NTPC Graduate Tier 1 2025 Shift-2 📅 06 Jun, 2025

A man has to cover a distance of 753 km in 12 hours. If he covers two-third of this distance in 2/3 of the time, then what should his speed (in km/hr) be to cover the remaining distance in the time left?

A
41.8
B
31.3
C
52.25
D
62.75
Result Summary
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RRB NTPC Graduate Tier 1
2025 • 06 Jun, 2025 • Shift-2
A man has to cover a distance of 753 km in 12 hours. If he covers two-third of this distance in 2/3 of the time, then what should his speed (in km/hr) be to cover the remaining distance in the time left?
Correct Answer
62.75
Remaining Distance Calculation: The total given distance is 753 km. Since 2/3 of it is already covered, the remaining distance is 1/3 of the total. So, 753 / 3 ......
Ref/Book : RRB NTPC Graduate Tier 1 2025
Ref. Subject Mathematics
Chapter -
Ref. Topic Speed, Time and Distance
Pg. No -
💡 Analysis & Explanation
Remaining Distance Calculation ▼
The total given distance is 753 km. Since 2/3 of it is already covered, the remaining distance is 1/3 of the total. So, 753 / 3 = 251 km.
Remaining Time Calculation ▼
The total allotted time is 12 hours. The man has used up 2/3 of this time, leaving 1/3 of the time available. So, 12 / 3 = 4 hours.
Required Speed Computation ▼
Speed is fundamentally calculated by dividing distance by time. The required speed is 251 km divided by 4 hours.
Final Result ▼
251 / 4 evaluates exactly to 62.75.
Conclusion ▼
His required speed must be 62.75 km/hr to finish precisely on time.
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