Question 137571
hannah took a trip to visit her cousin.she drove 120 miles to reach her cousin's house and the same distance back home.
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it took her 1.2 hours to get halfway to her cousin's house. what was her average speed,in miles per hour, for the first 1.2 hours of the trip?
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Half of 120 mi is 60 mi
60 mi in 1.2 hrs (Speed = dist/time)
Av speed = {{{60/1.2}}} = 50 mph
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hanna's average speed for the remainder of the trip to her cousin's house was 40 per hour . how long, in hours, did it take her to drive the remaining distance?
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Remainder is also 60 mi: (Time = dist/speed)
Time = {{{60/40}}} = 1.5 hrs
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traveling home along the same route, hanna drove at an average rate of 55 miles per hour.after 2 hour her car broke down. how many miles was she from home?
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Find the distance covered in 2 hr, at 55 mph. (Dist = speed * time)
Dist = 55 * 2 = 110 miles
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Distance from home: 120 - 110 = 10 mi