By how much per cent must a motorist increase his speed in order to reduce by 20%, the time taken to cover a certain distance?

By how much per cent must a motorist increase his speed in order to

1.	By how much per cent must a motorist increase his speed in order to reduce by 20%, the time taken to cover a certain distance?
A.	25
B.	35
C.	45
D.	55
Answer» B. 35

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By how much per cent must a motorist increase his speed in order to reduce by 20%, the time taken to cover a certain distance?

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