While covering a distance of 54 km, a man noticed that after cycling for 1 hour 15 minutes, the distance covered by him was of the remaining distance. What was his speed (in km/hr)?
Given:
Total distance = 54 km
Time = 1 hr 15 min = 1.25 hr
Distance covered of the remaining distance
Formula used:
Speed = Distance ÷ Time
Solution:
Let distance covered = x km
Then remaining distance = 54 - x
x =× (54 - x)
9x = 7(54 - x)
9x = 378 - 7x
9x + 7x = 378
16x = 378
x = 378 ÷ 16 = 23.625 km
Speed = 23.625 ÷ 1.25 = 18.9 km/hr
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