SOLUTION: Using her jump rope Ella can make 17 jumps in 15 seconds. At this rate, how many jumps can she make in 20 minutes?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: Using her jump rope Ella can make 17 jumps in 15 seconds. At this rate, how many jumps can she make in 20 minutes?      Log On


   

Question 998284: Using her jump rope Ella can make 17 jumps in 15 seconds.
At this rate, how many jumps can she make in 20 minutes?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
First change 20 minutes into 1200 seconds (60 seconds per minute).
Then write the proportion
17/15 = x/1200
Multiply both sides by 1200 and get
x = (17/15)(1200) = 17*80 = 1360 jumps (she is gonna be tired)