How to find value of x when given the length, width and total surface area Example - Diagram screenshot above:

Total Surface Area of cuboid: 2lb + 2bh + 2hl

Length: 10cm
Base: 2cm
Height: xcm

Simplify:
2(10)(2) + 2(2)(x) + 2(x)(10) = 112

40 + 4x + 20x = 112
40 + 24x = 112

Make x the subject, therefore subtract 40 on both sides.

24x = 112 - 40
24x = 72

Find the value of x, hence divide by 24 on both sides.

x = 72/24

x = 3

don't report but were is the digram

step-by-step explanation:

the answer is 8/21

hope this

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.