Question: Non-metric version; (a) How long does a 2.0 x 10 5 Btu/h water heater take to raise the temperature of 40 gal of water from

Non-metric version; 

(a) How long does a 2.0 x 105 Btu/h water heater take to raise the temperature of 40 gal of water from 70oF to 100oF? Metric version: 

(b) How long does a 59 kW water heater take to raise the temperature of 150 L of water from 21oC to 38oC?

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