Question

 A circular plot is of radius 7m. Find the cost of painting it at Rs 5 per sq.m​

Answer 1

Answer:

circumference =2^r

2×22/7×7

=44 cm

cost of painting =44×5

= 220 rupees

Answer 2

Given

• A circular plot of radius 7m.
• Rate of painting per square meter is Rs5.

⠀

To find

• Cost of painting the plot.

⠀

Solution

• To solve the question, we need to calculate the area of the circular plot.

⠀

★ Formula used

$\: \: \: \: \: \: \: \: \: \: \: \: \boxed{\tt{\bigstar{Area_{(Circle)} = \pi r^2{\bigstar}}}}$

⠀

$\large{\tt{\longmapsto{Area = \dfrac{22}{\cancel{7}} \times \cancel{7} \times 7}}}$

⠀

$\large{\tt{\longmapsto{Area = 22 \times 7}}}$

⠀

$\large{\bf{\longmapsto{Area = 154m^2}}}$

⠀

★ Finding Total cost of painting the plot

$\tt:\implies{Cost = Rs(154 \times 5)}$

$\tt:\implies{Cost = Rs.770}$

⠀

Hence, the cost of painting is Rs770.

━━━━━━━━━━━━━━━━━━━━━━