Question

your daily workout plan involves a total of 40 min of running and swimming. You burn 20 calories per minute running and 10 calories per minute swimming. Let r be the number of minutes you run. How many calories will you run in your 40 min workout if you run for 20 min?

Answer 1

r + s = 40 min
runburn = 20 cal / min
swimburn = 10 cal / min
r = 20 min


r + s = 40 min
s = 40 min - 20 min
s = 20 min

totalburn = r * runburn + s * swimburn

totalburn = 20 min * 20 cal / min + 20 min * 10 cal / min

totalburn = 400 cal + 200 cal

totalburn = 600 cal