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A full bath tub will empty at an average rate 10 minutes.it will fill up to full at an average rate of 8 minutes.how long will it take to fill up to full if the plug is removed and tap is turned on?
Wiki User
∙ 12y ago
Let x be the volume of the tub. x/10 is the volume depleted per minute. Also x/8 is the volume replenished per minute. So net filling rate is x/8 - x/10 = 2x/80 per minute. The fill volume required is x. Hence time required in minutes is x/(2x/80) which is 80x/2x = 40 minutes
Wiki User
∙ 12y ago
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