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## powerprep #9

This topic has 1 member reply
dunkin77 Master | Next Rank: 500 Posts
Joined
01 Apr 2007
Posted:
269 messages

#### powerprep #9

Tue Apr 24, 2007 9:25 am
Hi,

I know the answer should be D) but I just wanted to know how to calculate the answer from 2).

From 1) it's easy rate=4mile per hr, hence 2.5hrs

Thank you!
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jayhawk2001 Community Manager
Joined
28 Jan 2007
Posted:
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Tue Apr 24, 2007 9:38 pm
For (2), calculate time taken with the minimum stated 9 minutes.

16 km (i.e. 10 miles) can be covered in 16*9 = 144 min at 9 min/km
So, if the time taken is longer than 9 min per km, the time is going to
be > 144 (which is definitely greater than 120 min). Hence sufficient.

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