Source: GMAT Paper Tests
The charge for a telephone call between City R and City S is $0.42 for each of the first 3 minutes and $0.18 for each additional minute. A certain call between these two cities lasted for x minutes, where x is an integer. Hoa many minutes long was the call?
1) The charge for the 3 minutes of the call was $0.36 less than the charge for the remainder of the call.
2) The total charge for the call was $2.88.
The OA is D
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
The charge for a telephone call between City R and City S is $0.42 for each of the first 3 minutes and $0.18 for...
This topic has expert replies
-
BTGmoderatorLU
- Moderator
- Posts: 2228
- Joined: Sun Oct 15, 2017 1:50 pm
- Followed by:6 members
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
Timer
00:00
Your Answer
A
B
C
D
E
Global Stats
1) The charge for the first 3 minutes of the call was $0.36 less than the charge for the remainder of the call.BTGmoderatorLU wrote: ↑Wed Feb 26, 2020 6:13 amSource: GMAT Paper Tests
The charge for a telephone call between City R and City S is $0.42 for each of the first 3 minutes and $0.18 for each additional minute. A certain call between these two cities lasted for x minutes, where x is an integer. Hoa many minutes long was the call?
1) The charge for the 3 minutes of the call was $0.36 less than the charge for the remainder of the call.
2) The total charge for the call was $2.88.
The OA is D
\(3\cdot 0.42=0.18\cdot y - 0.36\) (\(y\) is the number of minute for the remainder call) we can find the value of y and then y+3 ( the first minutes called). Sufficient \(\Large{\color{green}\checkmark}\)
2) The total charge for the call was $2.88
\(3\cdot 0.42+0.18\cdot z=2.88\) we also can find \(z\) and \(z+3=\) the number of minutes the call last. Sufficient \(\Large{\color{green}\checkmark}\)
Hence, D
