Let the side of one edge of tile = a cm.
So area of tile = (side)^2 =
But area of tiles = 900 square centimeter.
So
So side of one edge of tile is = 30 cm
The first one is the correct answer, enjoy!
The answer is C. because 1.5 is the height while x is next to it to show the multiplication of years to height
Perimeter = sum of all the sides
let x = one side
longer side = x + 10
Perimeter = x + x + x + x + 10
62 = 4x + 10
4x = 52
x = 13
Longer side = 23
Area = (10+23)x2/10
= 6.6
Differentiate both sides wrt :
By the chain rule, we get
Solve for :