A train covers 60 km at a uniform speed. If the speed had been 8 km/h more, it would have taken 10 hours less for the same journey. What is the speed of the train (in km/h)?
Show answer & explanation
Correct answer: A
Explanation
Correct Answer is option 1 i.e. 4
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Concept |
Understanding |
Application |
Fair calculation |
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Time = Distance/Speed |
Distance = 60 km Let initial speed = a Increased speed = (a + 8) |
According to the given condition: 60/a – 60/(a + 8) = 10 We can solve it with help of options: Option 1: Put a = 4 ⇒ 60/4 – 60/(4 + 8) ⇒ 10 = 10 Hence, a = 4 km/hr |
60/4 – 60/(4 + 8) ⇒ 15 – 5 ⇒ 10 |