7. Walking at 3/4 th of his usual speed, a man is 1 hour late. Find his usual travel time.
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Given : Walking at 3/4 th of his usual speed, a man is 1 hour late.
To Find : usual travel time.
Solution:
Lets assume that
Usual Speed = 4S km/hr
Usual Time = T hr
Distance = Speed x Time
=> Distance = 4S * T
=> Distance = 4ST km
Walking at 3/4 th of his usual speed
=> Speed = (3/4)4S = 3S km/Hr
Distance = 4ST km
Time taken = 4ST /3S = 4T/3 hr
4T/3 = T + 1
=> 4T = 3T + 3
=> T = 3 hrs
his usual travel time. = 3 Hrs
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