Length of a rectangle is 2 cm more than that of breadth. If breadth is 16 cm, then find the area of the rectangle.
Length = 18cm
Breadth = 16 cm
Area = l * b
= 18 * 16 = 288cm2
If perimeter of a square is 52 cm, then find the area of the square.
Perimeter of the square = 52cm
Perimeter of the square = side × 4 = 52cm
Therefore area of the square = side×side
Base of a triangle is 4 cm less than its height. If height is 18 cm, then find the area of the triangle.
Given that Base + 4 = Height ... ...(as base is 4 cm less than height)
► And Height = 18 cm
► So Base + 4 = 18 cm
► Base = 18 - 4 = 14 cm
So Area of triangle = ( base × height) / 2 = 126 cm2.
Find the circumference of the circle whose radius is 5.6 cm.
Given that the radius r = 5.6 cm
Circumference of a circle = 2 π r = 2 x π x 5.6 = 35.19 cm ≈ 35.2 cm
Find the perimeter of the following figure.
Perimeter = Sum of all sides
Here the sides are 4 cm , 4 cm , 5 cm , 4 cm and 5 cm
Sum of all sides = 4 + 4 + 5 + 4 + 5 = 22 cm
Perimeter of a rectangle and a square are equal. If perimeter of the rectangle is 72 cm, find the area of the square.
Given that Perimeter of rectangle is = 72 cm
► Perimeter of square = 4 x Side of a square
Given that perimeter of a rectangle and a square are equal.
► So 72 cm = 4 x Side of square
► Side of square = 72 / 4 = 18 cm
Now Area of Sqaure = ( side )2
► ( 18 )2 = 324 cm2
Length, breadth and height of a water tank are 12 m, 15 m, and 18 m respectively. Find the amount of water that the tank can hold.
For finding the amount of water, we need to find the volume of the container
Volume of the container = Lenght x Breadth x Height
= 12m x 15m x 18m = 3240m3
Height of a triangle is 3 times than the base. If base of the triangle is 36 cm, find area of the triangle.
Given that the base of triangle = 36 cm
► Height = 3 times base = 3 x 36 = 108 cm
► Area of the triangle = (b x h) / 2
► (108 x 36) / 2 = 1944cm2
Radius of a circle is 10.5 cm. Find the area of the circle.
Radius of the circle given
So the Area of a circle = π r2 = π x 10.52 = 346.36 cm2
Area of a square is 10000cm2. Find the perimeter of the square.
Area of square = 10000cm2 = side x side
= Side = 100 cm
Perimeter of the Square = 4 x side = 4 x 100 = 400 cm