Let speed of the 1st trip x miles / hr. and speed of the 2nd trip 3x / hr.
We know that
Speed = Distance/Time.
Time = Distance/Speed.
Time Taken to Cover a Distance of 50 miles on his First Trip = 50/x hr.
And Time Taken to Covered a Distance of 300 miles on his later trip = 300/3x hr.
= 100/x hr.
Time Taken Later is Twice As before Time Taken
ANSWER = (b) = Twice as Much
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