Question

Alina is able to swim at a rate of about 2.5 miles per hour. Talia is able to swim at a rate of 1.8 meters per second. Which statement comparing the two swimmers is accurate?

1 mile 1,609 meters
A) Alina swims about 0.7 miles per hour faster than Talia.
B) Talia swims about 0.7 miles per hour faster than Alina.
C) Alina swims about 1.5 miles per hour faster than Talia.
D) Talia swims about 1.5 miles per hour faster than Alina.

Answer 1

As we know that in an hour there are 3600 seconds so
1.8 x 3600 = 6480
6480 / 1609 = 4.02 miles / hr
4.02 - 2.5 = 1.5( by substracting the speed)
so correct option is D which is
Talia swims about 1.5 miles per hour faster than Alina
hope it helps

Answer 2

Answer: Option 'D' is correct.

Explanation:

Since we have given that

Rate at which Alina swim = 2.5 miles per hour

Rate at which Talia swim = 1.8 meters per second

First we need to change meters per second into miles per hour

As we have given that

`1\text{ miles}=1609\text{ meters}`

and

`1\text{ hour}=3600\text{ seconds}`

So, to change into miles per hours, we'll apply this,

`(1.8* 3600)/(1609)\\\\=4.02\text{ miles per hour}`

So,

Difference between their rates will be given by

`4.02-2.5=1.52\text{ miles per hour}`

Hence, Talia swims about 1.5 miles per hour faster than Alina.

So, Option 'D' is correct.