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pishuonlain [190]
3 years ago
8

You are swimming each 25 yd length of a swimming pool 3 seconds faster than your personal best. What integer represents your cha

nge in time of your personal best after 200 yards?
Mathematics
2 answers:
andreyandreev [35.5K]3 years ago
7 0

Suppose the number of laps = m

According to the question, each lap of 25 yards is covered 3 seconds faster than the previous one, so the series become

x , x-3 , x-6 , x-9, ............................

25 * m = 200

m = \frac{200}{25}

m = 8

As m is the number of laps, and each lap is 3 second faster.

So 8 laps will be 8*3 = 24 seconds faster.


AleksAgata [21]3 years ago
5 0

Answer: +24.

Step-by-step explanation:

Given : You are swimming each 25 yd length of a swimming pool 3 seconds faster than your personal best.

i.e. for each 25 yd length of a swimming round, +3 seconds faster than your personal best.

If the swimming timing is 200 yards, then the number of 25 yd length round of swimming in it :-

n=\dfrac{200}{25}=8

Then, the change in time of your personal best after 200 yards :-

8\times(3)=24\text{ seconds}

Hence, the integer represents your change in time of your personal best after 200 yards = +24.

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