Question

5. In the 2012 Olympics, Usain Bolt ran the 100 m dash in 9.63 seconds. Jim Hines won the 1968 gold with a time of 9.95 seconds.(a) Bolt's time was % faster than Hines'.(b) Hines' time was % slower than Bolt's.(c) Hines' time was % of Bolt's.

Answer 1

Given:

The timings of Usain Bolt is 9.63 seconds.

The timings of Jim Hines is 9.95 seconds.

a) To find Bolt's time was how much % faster than Hines'.

The Formula is,

$\frac{\text{Change in value}}{\text{Original value}}\times100$

Therefore, Change in value is, 9.95-9.63=0.32

Hence,

$\frac{0.32}{9.95}\times100=3.216$

Hence, the answer is 3.22% approximately.

b) To find Hines' time was how much % slower than Bolt's.

Therefore, Change in value is, 9.95-9.63=0.32

Hence,

$\frac{0.32}{9.63}\times100=3.3229$

Hence, the answer is 3.323% approximately.

b) To find Hines' time was how much % of Bolt's.

Here, Hine's time is 9.95 seconds

Hence,

$\frac{9.95}{9.63}\times100=103.323$

Hence, the answer is 103.323% approximately.