<span>15-h)*h=40
15h-h^2=40
h^2-15h+40=0
solve for h by quadratic formula:
a=1, b=-15, c=20
ans:
h=3.47 or 11.53 cm (height)
b=15-h=11.53 or 3.47 cm (base)</span>
190mph
I used speed calculator with advanced mode
HTTP://www.omnicalculator.com/everyday-life/speed
lateral area = 2 X pi X r X H
= 2 x 3.14 x 5 x 9 = 282.6
The answer is 6.55, because 42.6-(13.45+9.5)=19.65, and 19.65/3=6.55.
