Question

Find the cost of painting the square wall of side $5\text{cm}$. If the rate of painting is $₹25/c{m}^2$.

Answer 1

Step 1: Find the area of the square

We know that the area of a square of side $"\text{a}"$ is ${\text{a}}^2$

So, the area of square of side $5\text{cm}$ is $=5^2$

$=25{\text{cm}}^2$

Step 2: Find the cost of painting of the wall

$\because$The rate of painting is $₹25/c{m}^2$

Area of square wall $=25{\text{cm}}^2$

$\therefore$The cost of painting the square wall$=25{\text{cm}}^2\times ₹25/c{\text{m}}^2$

$=₹625$

Hence, cost of painting the square wall of side $5\text{cm}$ is $₹625$.