SOLUTION: At 6 A.M. a snowplow, traveling at a constant speed, begins to clear a highway leading out of town. At 8 A.M. an automobile begins traveling the highway at a speed of 35mi/hr and r

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Question 652326: At 6 A.M. a snowplow, traveling at a constant speed, begins to clear a highway leading out of town. At 8 A.M. an automobile begins traveling the highway at a speed of 35mi/hr and reaches the plow 20 minutes later. Find the speed of the snowplow.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
At 6 A.M. a snowplow, traveling at a constant speed, begins to clear a highway leading out of town. At 8 A.M. an automobile begins traveling the highway at a speed of 35mi/hr and reaches the plow 20 minutes later. Find the speed of the snowplow.
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Snowplow DATA:
time = 7/3 hrs ; rate = r mph ; distance = (7/3)r miles
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Car DAA:
time = 1/3 hr ; rate = 35 mph ; distance = (1/3)35 miles
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Equation:
distance = distance:
(7/3)r = (1/3)35
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7r = 35
r = 5 mph (speed of the snowplow)
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Cheers,
Stan H.