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swerve: Legendary Member; Posts: 2499; Joined: Sun Oct 29, 2017 2:04 pm; Followed by:6 members

jim's taxi Service charges an initial fee of $2.25 at the...

by swerve » Fri Dec 01, 2017 1:33 pm

Jim's Taxi Service charges an initial fee of $2.25 at the beginning of a trip and an additional charger of $0.35 for each 2/5 of a mile traveled. What is the total charge for a trip of 3.6 miles?

A. $3.15
B. $4.45
C. $4.80
D. $5.05
E. $5.40

The OA is E.

Please, can any expert explain this PS question for me? I don't understand why that is the correct answer. Thanks.

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Source: Beat The GMAT — Problem Solving | Fri Dec 01, 2017 1:33 pm

GMAT/MBA Expert

[email protected]: Elite Legendary Member; Posts: 10392; Joined: Sun Jun 23, 2013 6:38 pm; Location: Palo Alto, CA; Thanked: 2867 times; Followed by:511 members; GMAT Score:800

by [email protected] » Fri Dec 01, 2017 4:32 pm

Hi swerve,

We're told that Jim's Taxi Service charges an initial fee of $2.25 at the beginning of a trip and an additional charge of $0.35 for each 2/5 of a mile traveled. We're asked for the total charge for a trip of 3.6 miles.

3.6 miles = 18/5, so we know that after the initial $2.25, there will be an additional (9)($0.35) = $3.15 charged.
$2.25 + $3.15 = $5.40

Final Answer: E

GMAT assassins aren't born, they're made,
Rich

Contact Rich at [email protected]

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Scott@TargetTestPrep: GMAT Instructor; Posts: 8083; Joined: Sat Apr 25, 2015 10:56 am; Location: Los Angeles, CA; Thanked: 43 times; Followed by:29 members

hi

by Scott@TargetTestPrep » Thu Jan 11, 2018 2:15 pm

swerve wrote:Jim's Taxi Service charges an initial fee of $2.25 at the beginning of a trip and an additional charger of $0.35 for each 2/5 of a mile traveled. What is the total charge for a trip of 3.6 miles?

A. $3.15
B. $4.45
C. $4.80
D. $5.05
E. $5.40

Let's find how many "2/5 miles" are in 3.6 miles. Since 3.6 = 36/10 = 18/5, has (18/5)/(2/5) = 90/10 = 9 "2/5" miles; thus, the total charge for 3.6 miles would be 2.25 + 9 x 0.35 = $5.40.

Answer: E

Scott Woodbury-Stewart
Founder and CEO
[email protected]