Sarah wants to arrive at her friend's wedding at 3:00 PM. The distance from Sarah's house to the wedding is 95 miles. Based on usual traffic patterns, Sarah predicts she can drive the first 25 miles at 60 miles per hour, the next 5 miles at 30 miles per hour, and the remainder of the drive at 65 miles per hour. (a) How many minutes will it take Sarah to drive the first 25 miles? (b) How many minutes will it take Sarah to drive the next 5 miles? (c) How many hours will it take Sarah to drive the rest of the trip? (d) What time should Sarah leave her house?

1 answer

All your questions ask for "time"
in these questions, time = distance/rate
watch for units, some times are in minutes, others in hours

a) distance = 25 miles
rate = 60 mph
time = 25/60 hours = 5/12 hours OR 25 minutes
(realize that at 60 miles/hour, you would be going 1 mile per 1 minute.)

b) try the rest
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