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Question

X and Y are two stations which are 320 miles apart. A train starts at a certain time from X and travels towards Y at 70 mph. After 2 hours, another train starts from Y and travels towards X at 20 mph. At what time do they meet?

A
After 2 hrs
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B
After 3 hrs
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C
After 4 hrs
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D
After 5 hrs
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Solution

The correct option is C After 4 hrs
Distance traveled by train coming from Y in 2 hours=20×2=40 miles
They will meet at a distance of 32040=280 miles from X
Time required to cover 280 miles by train coming from X
=28070=4 h
Hence they meet after 4 hours.

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