Question

What is the cost of painting 10 books cover of length and breadth 5 m and 4 m respectively at Rs.2/m² ?
1. Rs. 200
2. Rs. 400
3. Rs. 240
4. Rs. 600

Answer 1

Correct Answer - Option 2 : Rs. 400

Given:

Length of book = 5 m and breadth of book = 4 m

Cost of painting book = Rs. 2/m²

Formula Used:

Area of rectangle = Length × Breadth

Calculation:

Here, area of the one book cover = 5 × 4 = 20 m²

⇒ Area of 10 books cover = 20 × 10 = 200 m² 

Cost of painting 10 books cover = 200 × 2 = Rs. 400

∴ The cost of painting 10 books cover is Rs. 400