SOLUTION: an efficient heater can warm the entire gym in 3 h. an older , less efficient heater requires 8 h to heat the same space. how long would it take to heat the gymnasium if both hea
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Question 454684: an efficient heater can warm the entire gym in 3 h. an older , less efficient heater requires 8 h to heat the same space. how long would it take to heat the gymnasium if both heaters worked together? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! an efficient heater can warm the entire gym in 3 h.
an older , less efficient heater requires 8 h to heat the same space.
how long would it take to heat the gymnasium if both heaters worked together?
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efficient heater rate = 1/3 job/hr
older heater rate = 1/8 job/hr
together heater rate = 1/x job/hr
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Equation:
rate + rate = together rate
1/3 + 1/8 = 1/x
8x + 3x = 24
11x = 24
x = 24/11 = 2 2/11 hrs = 2hr 11 minutes
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Cheers,
Stan H.
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