A conical cylindrical pool and a cylindrical pool are measured from the inside to have the same bottom and height. Use a water pump to fill the cylindrical pool with water and fill the pool in 15 minutes. How many minutes will it take to fill a conical pool with water using this pump with the same efficiency?
一个圆锥柱形水池和一个圆柱形水池从里面量等底等高，用抽水机往圆柱形水池内注水，15分钟注满水池．用这台抽水机以同样的效率往圆锥形水池注水，需多少分钟注满水池．
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<result>5</result>