A wind generator can charge a certain battery in 14 hours and a refrigerator can drain the fully-charged battery in 28 hours. If the wind generator charges the battery for seven hours before the refrigerator is hooked to the battery, how long after the refrigerator is hooked up will the battery be fully charged?

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The Answer of A wind generator can charge a certain battery in 14 hours and a refrigerator can drain the fully-charged battery in 28 hours. If the wind generator charges the battery for seven hours before the refrigerator is hooked to the battery, how long after the refrigerator is hooked up will the battery be fully charged?

A Wind Generator Can Charge a Certain Battery in 14