the number of calories burned while doing an activity can be expressed by rm, where r is the rate of calories burned and m is the the number of minutes spent doing the activity...
problem:
a 120 pound student playing volleyball burns 2.7 calories per minute. if the student plays for 30 minutes, how many calories does the student burn?
2007-08-30 16:27:10 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Calories burned = (2.7 cal/min)(30 min) = 81 calories
2007-08-30 16:35:04 · answer #1 · answered by Northstar 7 · 0⤊ 0⤋
traditional rate times time equals distance problem, at least half of word problems will fall into this category/format.
lol, if a 240 pound student burns 2.7 calories per minute for 30 minutes, the answer will be the same. always be sure to focus on the numbers that matter. sometimes they will mention numbers that have nothing to do with the problem. ignore them.
calories c=rt r=c/t t=c/r
rate r=2.7 calories/minute
time t=30 minutes
c=rt=(2.7 cal/m)(30m)=81.0 cal (notice the minutes cancel out)
always keep track of your units, it helps you make sure you are doing the problem correctly.
c=81.0 calories
2007-08-30 23:42:01 · answer #2 · answered by trogwolf 3 · 0⤊ 0⤋
given the formula the number of calories burned is rm
C = rn
C = (2.7)(30)
C = 81 calories burned
2007-08-30 23:37:23 · answer #3 · answered by 7 · 0⤊ 0⤋
2.7h = total calories burnt during that time
2.7 (30) = 81 calories in total
2007-08-30 23:46:00 · answer #4 · answered by pinkperfume 4 · 0⤊ 0⤋