A car covers a distance of 528 km. in a certain time at a speed of 66 km. /hr. How much distance would a truck cover at an average speed which is 24 km./hr. less than that of the speed of the car in time which is 7 hours more than that taken by the car ?
Time taken by car = 528/66.
=8 hr.
Average speed of truck = 66-24.
=42 km/hr.
Time taken by truck = 8+7.
=15 hr.
Distance traveled by truck = $$42\times15$$.
=630 km.
Hence, Option D is correct.
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