Question

Jennifer can wash 3 windows in 12 minutes. At this rate, how long will it take her to wash 20 windows?

A) 40 minutes
B) 80 minutes
C) 60 minutes
D) 240 minutes

Answer 1

Jennifer will take 80 minutes to wash 20 windows.

Step-by-step explanation:

To find how long it will take Jennifer to wash 20 windows, we need to determine the rate at which she washes windows. Jennifer can wash 3 windows in 12 minutes, so her rate is 3 windows per 12 minutes, or 1 window per 4 minutes.

To calculate how long it will take her to wash 20 windows, we can set up a proportion:

1 window / 4 minutes = 20 windows / x minutes

Cross-multiplying, we get:

1 * x = 20 * 4

Simplifying, we find:

x = 80 minutes

Therefore, it will take Jennifer 80 minutes to wash 20 windows.