Question

John rode 3150 m at an average speed of 350 m/min.If he had ridden at average of 375 m/min instead. How much sooner would it have taken? (In seconds)​

Answer 1

Explanation:

Given that:

Distance traveled = 3150m

Average speed = 350m/min

Suggested speed = 375m/min

Unknown:

Time = ?

Solution:

Speed is the rate of change of distance with time.

  it is mathematically expressed as;

     speed = $\frac{distance }{time}$

Initial time using speed 350m/min can be calculated by making time the subject of the formula;

     time taken = $\frac{distance }{speed}$

    time taken at speed of speed of 350m/min = $\frac{3150}{350}$ = 9min

   to seconds = 9 x 60 = 540 seconds

  time taken at speed of 375m/min = $\frac{3150}{375}$ = 8.4min

   to seconds = 8.4 x 60 = 504 seconds.

It could have taken 504 seconds sooner saving 36 seconds.

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Speed brainly.com/question/10177389

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