Answer:
30 minutes
Step-by-step explanation:
If we have 2 points, we can find the slope
m = (y2-y1) / (x2-x1)
(0,24) and (5,20)
m = (20-24)/(5-0)
= -4/5
We know the y intercept (where x=0) (0,24)
We can write an equation for the line in y =mx+b
y = -4/5x+24
We want y = 0 (when the diameter is 0)
0 = -4/5 x +24
Subtract 24 from each side
-24 = -4/5 x +24-24
-24 = -4/5 x
Multiply each side by -5/4 to get x alone
-5/4 * -24 = -5/4 * -4/5 x
30 = x
