Question

Phil consumed 1,200 calories at lunch. He has a goal of burning at least 5% of those calories by walking on the treadmill. If walking on the treadmill burns 200 calories per hour, which statement best describes how long he should walk on the treadmill?
more than 18 minutes
no fewer than 18 minutes
more than 3 hours
no fewer than 3 hours

Answer 1

he wants to burn 5% of 1,200 calories

so first multiply 5% * 1,200 (or 0.05*1,200) to find out how many calories he needs to burn

now, since he burns 200 cals/hr on the treadmill, divide the total calories / (200cals/hr) to get the time in hours

multiply by 60 mins/hr as needed to convert to minutes