Answer:
She needs to finish in 48.7 percent of the time it normally takes her
Step-by-step explanation:
6th grade math problem
swim 15 minutes 45 seconds
bike ride 45 minutes
She want to complete the 3 events in 70 minutes
swim + bike + run = 70
15 minutes 45 seconds + 45 minutes + run = 70 minutes
Combine like terms
60 minutes 45 seconds + run = 70 minutes
Subtract 60 minutes 45 seconds from each side
60 minutes 45 seconds - 50 minutes 45 seconds + run = 70 minutes - 60 minutes 45 seconds
run = 9 minutes 15 seconds
Her training run was 19 minutes
The percent of time she needs to take is time to finish / training run time
percent = 9 minutes 15 seconds/ 19 minutes
We need to put this in minutes. There are 60 seconds in 1 minute
9 minutes 15 seconds = 9 minutes 15/60 = 9.25 minutes
percent = 9.25 minutes / 19 minutes
percent = .486842105
percent = 48.7 percent
She needs to finish in 48.7 percent of the time it normally takes her
