Hey guys, can anybody help me with this one? The cost of a taxi ride is $1.20 for the first quarter mile and $0.40 for each succeding quarter mile. What is the cost in dollars for a taxi ride of m miles? a. 1.20+1.60m b. 0.80+1.60m c. 0.80+0.40m d. 1.60m-0.40 e. 1.60m-1.20 IMO is [spoiler]b Thanks![/spoiler]

For me, the easiest way is to simply ignore the part about "$1.20 for the first quarter mile." If we ignore this, we can see that it costs $1.60 for every mile (or 1.60m) But of course, we can't just leave out that part. Our answer so far of 1.60m doesn't take into account the fact that the first 1/4 mile costs more than the subsequent 1/4 miles. How much more? $0.80 more. So, we need to add that to our current total We get 1.6m + 0.8 (B)

Brent Hanneson wrote:For me, the easiest way is to simply ignore the part about "$1.20 for the first quarter mile." If we ignore this, we can see that it costs $1.60 for every mile (or 1.60m) But of course, we can't just leave out that part. Our answer so far of 1.60m doesn't take into account the fact that the first 1/4 mile costs more than the subsequent 1/4 miles. How much more? $0.80 more. So, we need to add that to our current total We get 1.6m + 0.8 (B) Tha't a cool way of solving the problem in shorter time. These are type of tricks we learn from Beat The GMAT. Thanks

I didn't understand how did you arrive at the $1.60 per mile figure. The question says that $1.20 for first quarter mile and $0.40 for each succeeding quarter mile......i think this means that 1.20x1 + 3x0.40 (because there are 3 more quarters in the one mile) = 1.20 + 1.20 = $2.40 per mile and hence for m miles it will be $2.40 m Can you please correct my understanding? Regards MSD

It only costs 1.20 for the FIRST quarter mile. Not for each first quarter mile of every succeeding mile.

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