Question
Buses start from a bus terminal with a speed of 20 km/hr
at intervals of 12 minutes. What is the speed of a boy coming from the opposite direction towards the bus terminal if he meets the buses at intervals of 10 minutes?Solution
Let the speed of boy = x kmph According to the question, Distance travelled by bus in 12 min with 20 kmph = Distance travelled by boy in 10 min with (20 + x) kmph in opposite direction => 20 × 12/60 = 10/60 (20 + x) => 240 = 200 + 10x => x = 40/10 = 4 kmph.
More Time and distance Questions
Find the Wrong number in the given number series.
29, 76, 123, 166, 209, 2561677, 1661, 1625, 1561, 1461, 1337.
Find the wrong no in the given number series.
2, 4, 8, 16, 33, 64
- 72, 102, 148, 200, 272, 362
- Find the wrong number in the given number series.
12, 21, 5, 38, 2, 71 42, 32, 60, 48, 96, 84
213, 215, 225, 257, 313, 393
0 7 26 63 126 215
...- Find the wrong number in the given number series.
25, 34, 18, 34, 9, 46 1024, 1056, 1096, 1144, 1196, 1260
