Zayn pour rice husks on the horizontal land at the rate of (13/90)π m³ per minute to form a conical pile of semi vertical angle 30°. i) Find the rate of change of the height of rice husks at the instant when t= 15 minutes.
ii) Find the rate of change of radius of the rice husk in terms of r​

Ican interpret and represent the remainder in division calculations sensibly for the context (eg 27.4 in calculating average height in cm: $27.44 if it represents an amount of money) solve the following problems. 15) the wildlife park charges $25.50 dollars per person to enter their park if the park made $15096 dollars today, how many people entered the park? 16) ms adams plus 2,230 other keen runners ran a marathon: between them they ran 94817.5km. how many km did each competitor run?