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17 June, 01:15

A horse ran at a constant speed for 4 hours. Then, it decreased its speed by 7 mph for the

remaining 442 miles. If the total distance was 730 miles, how long did it take to travel the

remaining 442 miles?

14.7

6.8

• 6.5

7.2

+3
Answers (1)
  1. 17 June, 01:35
    0
    Distance travelled in 4 hours ...

    730 - 442 = 288 miles

    Speed for the 4 hours;

    Speed = 288/4 = 72 miles/hour

    Speed for the rest of 442 miles ...;

    (72 - 7) = 65 miles/hour

    Time taken for 442 miles ...

    Time taken = Distance/Speed

    ; 442/65 = 6.8

    Time taken = 6.8 hours
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