A man decided to cover a distance of 6 km in 84 minutes. He decided to cover two
thirds of the distance at 4 km/hr and the remaining at some different speed. Find
the speed after the two third distance has been covered.
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Answer:
5 km/hr
Step-by-step explanation:
Two-thirds of the distance means: (2/3)*6 km =4 km
The time take two-thirds of the distance at 4 km/hr is = (4/4) hr = 1 hr
= 60 minutes
Now, the time left to cover the rest distance( 6 - 4 = 2km ) is 84 - 60 minutes = 24 minutes
24 min to cover distance 2 km
1 --------------------------- 2/24 km
60-------------------------- (2/24) * 60 km
= 5 km
So, the speed required to cover the distance is 5 km/hr.
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