A man covered a distance of 50 miles on his first trip, on a later trip he traveled 300 miles while going 3 times as fast. His new time compared with the old distance was?

A.

three times as much

B.

the same

C.

twice as much

D.

half as much

Correct answer is C

Let the speed of the 1st trip be x miles/hr

and the speed of the 2nd trip be 3x miles/hr

Speed = distance/time

∴ Time taken to cover a distance of 50 miles on the 1st trip

= \(\frac{50}{xhr}\)

time taken to cover a distance of 300 miles on the next trip

= \(\frac{300}{3xhr}\)

= \(\frac{100}{xhr}\)

∴the new time compared with the old time is twice as much