A man travels from A to B at a speed x km/hr. He then rests at B for x hours. He then travels from B to C at a speed 2x km/hr and rests for 2x hours. He moves further to D at a speed twice as that between B and C. He thus reaches D in 16 hr. If distances A-B, B-C and C-D are all equal to 12 km, the time for which he rested at B could be
2 hr
3 hr
4 hr
6 hr
Answers
Answered by
6
Answer:
The correct option is B.
Explanation:
Total time taken by the man to travel from A to D = 16 hr and total distance traveled = 36 km.
The time that he would have taken had he not rested in between will be (16-x-2x) = (16-3x).
But, this time should be equal to the addition of the times that he takes to travel individual segments. This is given as:
12/x + 12/2x + 12/4x = 21/x
Therefore, 21/x = 16-3x
x = 3 or 7/3
Answered by
1
Answer:
Explanation:
If a man cycles at 10 km/hr, then he arrives at a certain place at 1 PM. If he cycles at 15 km/hr, he will arrive at the same place at 11 AM. At what speed must he cycle to get there at noon?
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