3x - 20 + 2x = 180 because the angle on a straight line is 180 degrees
5x = 200
x = 40
Well, I can't see the rectangle you're working with,
but as far as I know, the area of a rectangle can ONLY
be written as a product.
The area of EVERY rectangle is
(its length) multiplied by (its width) .
I can't think of a way to write that as a sum.
Length of circular track is:
L = 2*r*pi
He run 3/4 of it so length is:
L' = 3*2/4*r*pi = 3/2*r*pi
To calculate speed of his movement we use formula:
v = s/t where s = L' and t = 1 minute 45 seconds = 105 seconds
v = L'/t = 3*r*pi/2*105
v = r* pi/70
If we take that r = 1
answer