Question

A rectangle has breadth 5cm and area 40cm2 . Its length is equal to the height of a triangle of base 18cm. Find the area of the triangle.

Answer 1

Let the length be a

Area = 40

=> Length× Width= 40

=> a ×5 = 40

=> a = 8

Length of rectangle= 8 cm

Height of triangle= 8 cm

Area of triangle= Base × Height/ 2

= 8 × 18 /2

= 8 × 9

= 72 cm^2

Answer 2

Area of rectangle = 40 cm^2

Given, breadth = 5 cm....

Area = l*b = 40
So, l is 8 cm....


Now, this is equal to h of triangle....

So, h = 8 cm....

Base = 18 cm...

Area of triangle

= 1/2 * b * h

= 1/2 * 18 * 8

= 72 cm^2.....


Hope this helps U