Question

What is the cost of painting a rectangular wall of $50{\text{cm}}^2$ at the cost of $₹100/{\text{cm}}^2$.

• A. ₹ 5000
• B. ₹ 4000
• C. ₹ 3000
• D. ₹ 2000

Answer 1

The correct option is A ₹ 5000

Given.
Area = $50{\text{cm}}^2$
Cost per unit area = $₹100/{\text{cm}}^2$
$\therefore$Total cost of painting
= Area x Cost per unit area
=50 x 100
=₹ 5000