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A train travels a certain distance at 60 km/hr in 2 hours. By how much percent its speed must be increased in order to travel twice the distance in same time? 1. 200 %2. 150 %3. 100 %4. 50 %5. 300 % |
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Answer» Correct Answer - Option 3 : 100 % Formula Used : Speed = Distance/Time Calculations : Initial distance = d1 = speed1 × time 1 ⇒ d1= 60 × 2 = 120km Now if the distance is doubled then speed will be = (2 × 120)/2 km/hr ⇒ 120 km/hr Percentage increased = (120 – 60)/60 × 100 % ⇒ 100% ∴ The percentage increase is 100% |
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