Q: On a straight route, two stations P and Q are 110 kilometres apart. One train departs from P at 7 a.m. and goes at 20 kmph to Q. Another train departs from Q at 8 a.m. and goes at a speed of 25 kmph towards P. When are they going to meet?
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A
10:30 a.m.
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B
10:00 a.m.
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C
10:40 a.m.
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D
10:24 a.m.
B
Answer:
B
Explanation:
using the formula for distance, which is distance = speed x time, to find the distance covered by each train in a given time period.
You are then setting the sum of the distances covered by both trains equal to the total distance between P and Q,
which is 110 km.
By solving this equation, you find that the trains meet after 3 hours,
which means they meet at 10 a.m.
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