Acylinder has a radius of 6 ft and a height of 25 ft. explain whether tripling the height will triple the volume of the cylinder.

The volume is A*H where A is the area of one of the ends (circle) and H is the height.  So YES, the height is directly (linearly) proportional to the height.  Triple the height, triple the volume. Note the area of the circle on the end of the cylinder (A) is π r^2.  Therefore tripping the radius will increase the volume by 9, not 3.

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.