Let x represent the side length of the square. Then
(x +4)*(x -5) +40 = x^2
x^2 -x -20 +40 = x^2
20 = x
The rectangle is 15 cm by 24 cm, and its area is 360 cm^2.
Of my walk in the park i'd say 20 meters if i have to round it , if i don't have to round it , then i'd say is 19.78
We have a proportion: ?/50= 40/100
Cross multiply:
100*?= 40*50
⇒ ?= 40*50/100= 20
The student needs to score 20 points~
To find the surface area of the triangular prism, simply find the area of the triangular face, and multiply that by a value of 2, to obtain the total surface area for the triangular faces, then find the area of the rectangular faces, by using that formula, do this 3 times for the 3 rectangular faces.
Then add up all of the surface areas of the rectangles, and triangles together to find the total surface area.
