Question

The length and breadth of a rectangular wall are 75 m and 32 m, respectively. Find the cost of painting the wall if the rate of painting is Rs 3 per sq. m.​

Answer 1

Rs 7200

Explanation:

area of a rectangle = breadth x length

Given:

• breadth = 32 m
• length = 75 m

⇒ area = 32 x 75 = 2400 m²

Given:

cost per m² = Rs 3

⇒ cost = 3 x 2400 = 7200

Answer 2

Rs 7200

Find the area of wall:

area of rectangle: Length * Width

• length * width

• 75 * 32

• 2400 m²

`\sf cost \ of \ painting =\sf area \ of \ wall *area \ painting \ cover}` as said ** 1 m costs Rs 3 **

using the equation:

• cost of painting = 2400 * 3

• cost of painting = 7200

Therefore, the cost of painting is Rs 7200