Question

Brady can feed, water, and clean up after 24 cows in 120 minutes. McKenna takes 360 minutes to care for 24 cows. How long will it take Brady and McKenna working together to care for 24 cows?

Answer 1

Minutes= 90

Explanation:

Brady will take care of 24 cows in 120 minutes.

Rate of Brady = 24/120

Mc Kenna takes care of same 24 cows in 360 minutes.

Rate of Mc Kenna = 24/360

Sum of rates = 24/120 + 24/360

Sum of rates =( 72+24)/360

Sum of rates = 96/360

Sum of rates = 96/360

Let's determine how many minutes it will take them total to take of Same 24 cows

Minutes = 24/rate

Minutes = 24/(96/360)

Minutes =( 24*360)/96

Minutes= 90