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In 20092009, Usain Bolt set the world record for sprinting 100 \text{ m}100 m in approximately 9\dfrac359 5 3 ? seconds. Find his average speed in meters per second.

User Talvalin
by
8.3k points

2 Answers

1 vote

Ans125/12

Explanation:

User Moiz Tankiwala
by
7.7k points
5 votes

Answer:


10(5)/(12)\approx 10.42
meters per second.

Step-by-step explanation:

We have been given that in 2009, Usain Bolt set the world record for sprinting 100 m in approximately
9(3)/(5) seconds.

To find average speed of Usain Bolt in meters per second we will divide 100 by
9(3)/(5).

Let us concert
9(3)/(5) in improper fraction.


9(3)/(5)=(48)/(5)


\text{Average speed of Usain Bolt}=100/(48)/(5)

Since we know that dividing a number by fraction is same as multiplying the number by reciprocal of the fraction.


\text{Average speed of Usain Bolt}=100*(5)/(48)


\text{Average speed of Usain Bolt}=(500)/(48)


\text{Average speed of Usain Bolt}=(125)/(12)=10(5)/(12)


\text{Average speed of Usain Bolt}=10(5)/(12)\approx 10.42

Therefore, the average speed of Usain Bolt is
10(5)/(12)\approx 10.42 meters per second.

User Johnc
by
8.3k points
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