take Henry to drive

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take Henry to drive

by sanju09 » Mon Jul 26, 2010 1:39 am
How long did it take Henry to drive to work last Wednesday? (He did not stop on the way).

1. If he had driven twice as fast he would have taken 35 minutes.
2. His average speed was 30 miles per hour.

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by outreach » Mon Jul 26, 2010 3:48 am
A. is it correct?


d=st -(1)
d-distance
s-speed
t-time

stmt1
d=2s*35=70s (2)
solve 1 and 2
t=70 min

suff

stmt2
not suff, since we do not know the distance
sanju09 wrote:How long did it take Henry to drive to work last Wednesday? (He did not stop on the way).

1. If he had driven twice as fast he would have taken 35 minutes.
2. His average speed was 30 miles per hour.

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by selango » Mon Jul 26, 2010 10:51 am
T=?

stmt1,

D=2S*35

D/S=70=T

Sufficient.

stmt2,

we dont know abt D and T.

Insufficient

Pick A
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