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A bus covers some distance at a certain speed. If a person covers one-third of that distance in triple time, then the ratio of the speed of the person to the speed of the bus is:A. 1 : 3B. 3 : 1C. 1 : 9D. 9 : 11. B2. D3. A4. C |
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Answer» Correct Answer - Option 4 : C Given: The time required to cover one-third of distance in triple time Formula used: Speed = Distance/Time Calculation: Let the distance, D covered by the bus in time, T with speed, S ⇒ Speed of bus, S1 = D/T ----(1) According to question Speed of person, S2 = (D/3)/(3T) ⇒ S2 = D/9T ----(2) Divide equation (2) by (1) ⇒ S2/S1 =(D/9T)/(D/T) ⇒ S2/S1 = 1/9 ⇒ S2 : S1 = 1 : 9 ∴ The ratio of the speed of the person to the speed of the bus is 1 : 9 |
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