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A car covers a certain distance in 3 hours at the speed of 124 kms/hr . What is the average speed of a truck which travels a distance of 120 kms less

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A car covers a certain distance in 3 hours at the speed of 124 kms/hr . What is the average speed of a truck which travels a distance of 120 kms less than the car in the same time ?
A. 88 kms/hr.
B. 84kms/hr.
C. 78 kms/hr.
D. 73 kms/hr.
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Correct Answer - B
Distance covered by car in 3 hours = `124 xx 3 = 372` km
Distance covered by truck in 3 hours
`= 372 - 120 = 252` km .
Average speed of truck = `(252)/(3) = 84` km/hr
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