In a cross-country race, a motorist averages a speed of 140 mph during the first 4 hours and then increases his average by 20 mph during the last 3 hours. What was his average speed during the entire race?
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4
Answer:
hiii
your answer is here !
Step-by-step explanation:
=> Distance traveled in first 4 hours = 140 x 4 = 560 miles.
=> Distance traveled in next 3 hours = 160 x 3 = 480 miles.
=>Therefore, the total distance traveled = 1040 miles.
=> The total time taken = 7 hours.
=> Therefore, the average speed = 1040/7 = 148 4/7mph.
=> follow me !
Answered by
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Answer:
Yes
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