How many miles long is the route from Houghton to Callahan?
(1) It will take 1 hour less time to travel the entire route at an average rate of 55 miles per hour than at an average rate of 50 miles per hour.
(2) It will take 11 hours to travel the first half of the route at an average rate of 25 miles per hour
OA D
Source: Official Guide
How many miles long is the route from Houghton to Callahan?
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Say the distance from Houghton to Callahan is D miles.BTGmoderatorDC wrote:How many miles long is the route from Houghton to Callahan?
(1) It will take 1 hour less time to travel the entire route at an average rate of 55 miles per hour than at an average rate of 50 miles per hour.
(2) It will take 11 hours to travel the first half of the route at an average rate of 25 miles per hour
OA D
Source: Official Guide
Let's take each statement one by one.
(1) It will take 1 hour less time to travel the entire route at an average rate of 55 miles per hour than at an average rate of 50 miles per hour.
=> D/50 - D/55 = 1
D = 5500 miles. Sufficient.
(2) It will take 11 hours to travel the first half of the route at an average rate of 25 miles per hour.
=> D/2 = 25*11 => D = 50*11 = 5500 miles. Sufficient.
The correct answer: D
Hope this helps!
-Jay
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