A car is traveling at an average speed of 60km per hour. How much distance will it cover in 1hour 12 minutes?

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50 km

72 km

63 km

67.2 km

answer is B.

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Detailed Solution

Given,
Average speed of car is 60 km per hour.
Therefore, the distance covered by car in 1 hour = 60 km.
Converting the time into minutes,
1 hr = 60 min
1 hr 12 min = (60+12) min =72 min.
Let us consider the distance covered in 72 min be x km.
Then,

Distance (in km)	60	x
Time (in min)	60	72

As this is the case of direct proportion, therefore the ratio will remain constant throughout the table that is,

6060 = x 72

1 = x 72

Cross multiplying,

x = 72

Hence, the distance traveled in 1 hr 12 min is 72 km.
Therefore, option 2 is correct.

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