Grain is emptying from the bottom of a funnel-shaped hopper at a rate of 1.2m3/min. If the diameter of the top of the hopper is 5m and the sides make an angle of 30o with the vertical, determine the rate at which the level of grain in the hopper is changing, when it is half the height of the hopper.(adsbygoogle = window.adsbygoogle || []).push({});

P.S. (I am supposed to use implicit differentiation to find rates of change)

The answer is -0.24m/min.

I can't get it!!

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Related rates grain hopper problem

**Physics Forums | Science Articles, Homework Help, Discussion**