(2165-59)/3=
.............
<u>Answer-</u>

<u>Solution-</u>
The dimensions of the cuboid is, 80×80×140 cm
So, its volume will be
cm³
The dimensions of the cylinder is, radius = 40cm, height = 70cm
So, its volume will be
cm³
Total volume,

As we know,




The answer is

first you must multiply or use the FOIL method (First, Outer, Inner, Last)
First you multiply the first terms

this gives you 3x^2, then you multiple the outer terms

this gives you -21x, then you multiply the inner terms

that gives you 2x, finally you multiply the last terms

that gives you 14, now you combine like terms

now you put all the terms together and end up with your solution
To find an average you add all numbers together then divide by the amount of numbers that you added. So if there are 4 numbers you would divide by 4. By going backwards you can find the answer. Multiply 5 by 4 and you get 20, which is the answer.