Did it take Pei more than 2 hours to walk a distance of 10 miles along a certain trail? (1 mile = 1.6 kilometers)
(1) Pei walked this distance at an average rate of less than 6.4 kilomters per hour.
(2) On average, it took Pei more than 9 minutes per kilometer to walk this distance.
Can someone please explain this, the answer is down below
The answer is D
GMAT PREP (Distance & Rate)
This topic has expert replies
-
- Junior | Next Rank: 30 Posts
- Posts: 27
- Joined: Sat Feb 07, 2009 6:14 pm
- Location: Las Vegas, NV
- Thanked: 7 times
- Followed by:1 members
- GMAT Score:760
The question is really asking if Pei travelled more than 5 mph or 5*1.6=8kph.relaxin99 wrote:Did it take Pei more than 2 hours to walk a distance of 10 miles along a certain trail? (1 mile = 1.6 kilometers)
(1) Pei walked this distance at an average rate of less than 6.4 kilomters per hour.
(2) On average, it took Pei more than 9 minutes per kilometer to walk this distance.
Can someone please explain this, the answer is down below
The answer is D
(1) says he was slower. Options: A,D
(2) 9 minutes per km = 1km/9min*(60min/1hr)=60km/9hr=between 6 and 7 km/hr. So he was slower.
Answer: D
Free Hour of Live Online GMAT Training
Griscom Test Prep
www.griscomtestprep.net
[email protected]
702-406-7688
Griscom Test Prep
www.griscomtestprep.net
[email protected]
702-406-7688
- sureshbala
- Master | Next Rank: 500 Posts
- Posts: 319
- Joined: Wed Feb 04, 2009 10:32 am
- Location: Delhi
- Thanked: 84 times
- Followed by:9 members
Clearly first statement says that the speed is 4 miles/hour and hence he will definitely take more than 2 hrs to cover 10 kmgriscomtestprep wrote:The question is really asking if Pei travelled more than 5 mph or 5*1.6=8kph.relaxin99 wrote:Did it take Pei more than 2 hours to walk a distance of 10 miles along a certain trail? (1 mile = 1.6 kilometers)
(1) Pei walked this distance at an average rate of less than 6.4 kilomters per hour.
(2) On average, it took Pei more than 9 minutes per kilometer to walk this distance.
The answer is D
(1) says he was slower. Options: A,D
(2) 9 minutes per km = 1km/9min*(60min/1hr)=60km/9hr=between 6 and 7 km/hr. So he was slower.
Answer: D
Coming to the second statement, there is no need to get into the speed calculation.
Given that for 1 km he takes more than 9 minutes.
So for 16 kms (10 miles) he will take more than 144 (9x16) minutes, which is obviously more than 2 hours.
So D is the answer
-
- Junior | Next Rank: 30 Posts
- Posts: 27
- Joined: Sat Feb 07, 2009 6:14 pm
- Location: Las Vegas, NV
- Thanked: 7 times
- Followed by:1 members
- GMAT Score:760
I like that.
Free Hour of Live Online GMAT Training
Griscom Test Prep
www.griscomtestprep.net
[email protected]
702-406-7688
Griscom Test Prep
www.griscomtestprep.net
[email protected]
702-406-7688