Question

You are swimming each 25 yard length of a swimming pool 3 seconds faster than your personal best. What integer represents your change in time of your personal best after 200 yards?

Answer 1

Answer: He takes 24 seconds which represents change in time of his personal best after 200 yards .

Explanation:

Since we have given that

Distance he covered by swimming = 25 yards

Time taken by him = 3 seconds

`\text{Speed of his swimming} =(Distance)/(Time)\\\\ \text{Speed of his swimming} =(25)/(3)`

Now, if he covers 200 yards , the change of time will be

`\text{Time taken}=(Distance)/(Speed)\\\\\text{Time taken}=(200)/((25)/(3))\\\\\text{Time taken}=(200* 3)/(25)\\\\\text{Time taken}=8* 3\\\\\text{Time taken}=24 seconds`

Hence, he takes 24 seconds which represents change in time of his personal best after 200 yards .