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The latest model of space shuttle can achieve a maximum speed of 25 mi

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Re: The latest model of space shuttle can achieve a maximum speed of 25 mi [#permalink]
The latest model of space shuttle can achieve a maximum speed of 25 miles per second. This maximum speed is how many miles per hour?

A. 1,500
B. 3,600
C. 9,000
D. 15,000
E. 90,000

Solution

Maximum Speed $$= 25$$ miles per second

Maximum Speed in terms of hour $$= (25*60*60)$$ miles per hour $$= (\frac{100}{4} * 60 * 60)$$ miles per hour $$= \frac{36000}{4} = 9000$$ miles per hour.

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Re: The latest model of space shuttle can achieve a maximum speed of 25 mi [#permalink]
EgmatQuantExpert wrote:
The latest model of space shuttle can achieve a maximum speed of 25 miles per second. This maximum speed is how many miles per hour?

A. 1,500
B. 3,600
C. 9,000
D. 15,000
E. 90,000

Solution

Maximum Speed $$= 25$$ miles per second

Maximum Speed in terms of hour $$= (25*60*60)$$ miles per hour $$= (\frac{100}{4} * 60 * 60)$$ miles per hour $$= \frac{36000}{4} = 9000$$ miles per hour.

Thanks,
Saquib
Quant Expert
e-GMAT

I think you forgot a zero.

Shouldn't it be 360,000? Then $$\frac{360,000}{4}$$= 90,000.
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Re: The latest model of space shuttle can achieve a maximum speed of 25 mi [#permalink]
The latest model of space shuttle can achieve a maximum speed of 25 miles per second. This maximum speed is how many miles per hour?

A. 1,500
B. 3,600
C. 9,000
D. 15,000
E. 90,000

Since 1 hour = 3,600 seconds, the maximum speed is 25 x 3,600 = 90,000 mph.