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

Alina swims about 0.7 miles per hour faster than Talia.
Talia swims about 0.7 miles per hour faster than Alina.
Alina swims about 1.5 miles per hour faster than Talia.
Talia swims about 1.5 miles per hour faster than Alina. pls help

Answer 1

The answer is 
(D) Talia swims about 1.5 miles per hour faster than Alina.

Answer 2

Answer:  

Talia swims about 1.5 miles per hour faster than Alina.

Step-by-step explanation:

Since, 1 miles = 1609 meter and 1 hour = 60 seconds,

⇒ $\text{ 1 miles per hour } = \frac{1609}{3600}\text{ meter per seconds}$

⇒ $\text{ 1 meter per seconds } = \frac{3600}{1609}\text{ miles per hours}$

Here, The speed of Alina = 2.5 miles per hour = 2.5 × 1609/3600

$=\frac{4022.5}{3600} \text{ meter per seconds }$

$=1.11736111\text{ meter per seconds}$

And, the speed of Talia = 1.8 meter per second,

Since 1.8  > 1.11736111

⇒ Talia swims faster than Alina.

And, the difference between their speeds = 1.8 - 1.11736111 = 0.68263889 meter per seconds

= 0.68263889× 3600/1609 miles per hour

= 1.52734618 miles per hour ≈ 1.5 miles per hour ,

⇒ Fourth option is correct.