1. Water is being poured at 15 ft³/mininto a conical reservoir that is 20 ft deep and has a top radius of 10 ft (Figure 1)

1. How long will it take to fill the empty reservoir?
2. How fast is water level raising when water is 4 ft deep?
3. How fast is water level raising when water is 16 ft deep?

3 15 ft /min 10 ft K 20 ft h(X