Question

Lily swims a 100 meter race She swims the first half in 27.8 seconds She swims the second half in 30.12 seconds Ahout how much longer does it take her to swim the second half of the race than the first half?

Answer 1

It takes 2.32 more seconds to swim the second half.

Explanation:

If lily swims 100 meter and she swims the first half in 27.8 seconds and the second one in 30.12 seconds, we have that the distance for both sections is the same (50 meters) so we have to analyze the time.

If we called "x" the time of the first section and "y" the time for the second one, we can write y = x + c, where "c" is how much longer does it takes to swim the second half.

⇒ replacing with data given before:

30.12 seconds= 27.8 seconds + c ⇒

30.12 seconds - 27.8 seconds = c

⇒ c= 2.32 seconds.

Summarizing it takes 2.32 more seconds to swim the second half.

Answer 2

2.32 seconds

Explanation:

Lisa swims the first half of the race in 27.8 seconds and the second half of the race in 30.12 seconds.

It take her

`30.12-27.8=2.32\ seconds`

longer to swim the second part than the first one.