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Statement 1 We dont know the distance so we cannot calculate T
Statement 2 IF we apply ratios we can solve it easily. New velocity is 1.2 (6/5) times the old velocity i.e if velocity has increased 6/5 times then time to cover the same distance will reduce to 5/6 times. so we can write that 5/6T(old time taken)=3(new time taken) so T(old)=3.6 hrs
so from statement 2 we know the time taken so the ANS is B
How long did it take Carlos to drive nonstop from his home to Atlanta, Georgia?
(1) Carloss average speed for the trip was 55 miles per hour --> Rate=55 miles per hour, we still need Distance to get Time. Not sufficient.
(2) If Carloss average speed for the trip had been 20 percent faster, the trip wouldve taken 3 hours --> notice that we are dealing with the SAME distance: Distance=Rate*Time=(1.2*Rate)*3 --> Rate*Time=(1.2*Rate)*3 --> Time=3.6 hours. Sufficient.
Re: How long did it take Carlos to drive nonstop from his home [#permalink]
24 May 2016, 22:56
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