If a man travels at a speed of 30 km/h, he reaches his destination 10 min late and if he travels at a speed of 42 km/h, he reaches his destination 10min early. The distance travelled is
(a) 36 km (b) 35 km (c) 40 km (d) 42 km
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Answer:
Correct Answer:
B) 35 km
Description for Correct answer:
Let the distance be x km.
Then, correct time at a speed of
30 km / h = x30 - 1060
Correct time at a speed of 42 km /h
= x42 + 1060
=> x30 - 1060 = x42 + 1060
=> x30 - x42 = 26
=> x(12)1260 = 26
=> 72 x = 1260 × 2
=> x = 1260×272 => x = 35 km
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