Question
Download Solution PDFA bus travelling at 87 km/h completes a journey in 15 hours. At what speed will it have to cover the same distance in 9 hours?
This question was previously asked in
RPF Constable 2024 Official Paper (Held On: 07 Mar, 2025 Shift 2)
Answer (Detailed Solution Below)
Option 2 : 145 km/h
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Detailed Solution
Download Solution PDFGiven:
Speed of bus (S1) = 87 km/h
Time taken (T1) = 15 hours
New time required (T2) = 9 hours
Formula used:
Distance (D) = Speed × Time
For constant distance: S1 × T1 = S2 × T2
Calculation:
Distance = 87 × 15
⇒ D = 1305 km
New speed required (S2):
⇒ S2 = D ÷ T2
⇒ S2 = 1305 ÷ 9
⇒ S2 = 145 km/h
∴ The correct answer is option (2).
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