Tap A and Tap B can fill a tank in 30 minutes and 20 minutes respectively. Tap A is turned on for 5 minutes and then Tap Bis turned on so that both taps fill the tank. For what length of time do both taps run together?
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the answer is 30/5 + 20/5 so it is 6+4 so the answer is 10 pla mark me brainliest
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