Basically you can write taking from something or using something 20 times. Here are three examples.
- You borrowed 1 dollar from someone 20 times.
- You descend 1 meter at a time (like a submarine).
- There are 20 candies in the jar. Each day you eat 1 candy.
Answer:
The volume of cone changing at rate 
Step-by-step explanation:
Let r be the radius of cone and h be the height of cone


We have to find the rate at which the volume of cone changing when r=10 in and h=20 in
Volume of cone

Differentiate w.r.t t

Substitute the values


Hence, the volume of cone changing at rate 
X=3
Just look at where the two lines intercept and see the x value
Answer:
the Slopes For each one are Positive