1.

 A man covers a certain distance on car. Had he driven 21 kmlr1 faster, he would have taken 7 hours less. If he had driven the car 13 kmlr1 slower, he would have taken 13 hours more. What is the distan

A. 420 km
B. 450 km
C. 480 km
D. 510 km
Answer» E.


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