If A travels to his school from his house at the speed of 4 km h then he reaches the school 8 minute...........

Quantitative Aptitude ( CCS) Time & distance

If A travels to his school from his house at the speed of 4 km/h, then he reaches the school 8 minutes late. If he travels at the speed of 5 km/h, he reaches the school 7 minutes earlier than school time. The distance of his school from his house is:

3km

5km

2km

6km

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Explanation:

Solution:
Let the distance between school and home be x km.
The difference of time is (7+8)15 min = 15/60 hour.
Now,
(x/4)-(x/5)= 15/60
x/20 = 1/4
x = 5km.