SOLUTION: Kay spends 250 minutes exercising. Her ratio of aerobics to weight training is 7 to 5. How many minutes per week does she spends on aerobic? How many minutes per week does she spen

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Question 62078: Kay spends 250 minutes exercising. Her ratio of aerobics to weight training is 7 to 5. How many minutes per week does she spends on aerobic? How many minutes per week does she spend on weight training?
Answer by joyofmath(189) About Me  (Show Source):
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Kay spends 250 minutes exercising. Her ratio of aerobics to weight training is 7 to 5. How many minutes per week does she spends on aerobic? How many minutes per week does she spend on weight training?


Kay spends 7/(7+5) or 7/12 of her time doing aerobics. She spends a total of 250 minutes per week on exercise. So, she spends (7/12)*250 = 145.833 minutes doing aerobics. Her weight training time is the balance of the time or 250 - 145.833 = 104.167 minutes.