From Aqua-Bella island, it is possible to reach Aqua-Marine island by either ferry A or ferry B. Ferry A...

This topic has expert replies
Moderator
Posts: 1555
Joined: 29 Oct 2017
Followed by:2 members

Timer

00:00

Your Answer

A

B

C

D

E

Global Stats

Economist GMAT

From Aqua-Bella island, it is possible to reach Aqua-Marine island by either ferry A or ferry B. Ferry A sails 3 hours at 7 kilometers per hour, while ferry B takes a route that is three times longer. If ferry A is slower than ferry B by 2 kilometers per hour, how many hours longer is the journey of ferry B compared with the journey of ferry A?

A. 4
B. 7
C. 8.6
D. 9.6
E. 12.6

OA A

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3007
Joined: 22 Aug 2016
Location: Grand Central / New York
Thanked: 470 times
Followed by:32 members
AAPL wrote:
Mon Aug 03, 2020 11:51 am
Economist GMAT

From Aqua-Bella island, it is possible to reach Aqua-Marine island by either ferry A or ferry B. Ferry A sails 3 hours at 7 kilometers per hour, while ferry B takes a route that is three times longer. If ferry A is slower than ferry B by 2 kilometers per hour, how many hours longer is the journey of ferry B compared with the journey of ferry A?

A. 4
B. 7
C. 8.6
D. 9.6
E. 12.6

OA A
Given that Ferry A sails 3 hours at 7 kilometers per hour, the total distance ferry covers = 3*7 = 21 kilometers.

Thus, the length of ferry B = 3*21 = 63 km.

Also, given that ferry A is slower than ferry B by 2 kilometers per hour, speed of ferry B = 7 + 2 = 9 kmpl

Thus, time taken by ferry B = 63/9 = 7 hours

Thus, compared with ferry A ferry b takes 7 – 3 = 4 hours more

Correct answer: A

Hope this helps!

-Jay
_________________
Manhattan Review GMAT Prep

Locations: GMAT Prep Phoenix | GRE Prep West Palm Beach | GMAT Prep Asia | SAT Prep St. Louis | and many more...

Schedule your free consultation with an experienced GMAT Prep Advisor! Click here.