Answer:
The surface area of the cuboid is 42 sq.cm.
Step-by-step explanation:
The cuboid is made of 3 unit cubes like the one to its left
Surface area of cube =
Where a is the side of cube
We are given that surface area of cube is 18 sq.cm.
So, 
Now these 3 cubes are joined together to form cuboid
So, Length of cuboid =
Breadth of cuboid = 
Height of cuboid =
Surface area of cuboid =
Hence the surface area of the cuboid is 42 sq.cm.
Answer:
165
Step-by-step explanation:
you need to x it
Answer:
117.8 cubic inches
Step-by-step explanation:
Here is the formula pi r^2 h
pi * (2.5)^2 * <u>6</u> = 117.75 cubic inches
Change the '6' if it is a different number than 6%
Answer:
The rectangle is 16*18
Step-by-step explanation:
The area of a rectangle is length * width and the perimeter is 2 times length * width
A = l*w
P = 2(l+w)
Replacing A and P
288 = l*w
68 = 2(l+w) => 34 = l+w => 34 - w = l
replacing l in the area
288 = (34 - w) w
w^2 - 34w + 288 = 0
(w - 16)(w - 18)
w = 16
w = 18
replacing in 34 - w = l
you get that when w = 16, l = 18 and when w = 18, l = 16
