Question

the formula for the volume of a cone is v=1/3pir^2. find the radius to the nearest hundredth, of a cone with a hieght of 5 inches and a volume of 20inches^3

Answer 1

1. Isolate r:\[V = \frac{\pi r^2h}{3}\]\[3V = \pi r^2 h\]\[\frac{3V}{\pi h} = r^2\]\[\sqrt{\frac{3V}{\pi h}} = r\]

2. Plug in given values for V and h:
\[\sqrt{\frac{3(20)}{\pi (5)}} = r\]

3. Evaluate the left side using your calculator:

Answer 2

what do you mean evaluate it ?

Answer 3

is it 3.82in

Answer 4

@Hero is that right

Answer 5

or1.95in

Answer 6

1.95 is correct

Answer 7

ok thanks!!!!!!

Answer 8

@Hero can u tell me if this is correct.