Question

The radius of a circular garden is 56 m. What is the cost of four round fence around this garden at the rate of 40 per metre?​

Answer 1

Step-by-step explanation:

r=56cm. [Given]

Perimeter = 2πr = 2×22/7×56 cm = 264cm.

Cost of 4 roud fence = 4×$40/m×56m = $8960

Answer 2

$\bf \: \underline{Given} :$ ↴

$\sf \: The \: radius \: of \: a \: circular \: garden \: is \: 56 \: m.$

$\bf \: \underline{To \: find }:$ ↴

$\sf \: Cost \: of \: four \: round \: fence \: around \: this \: garden \: at \: the \: rate \: of \: 40/ m$

$\bf \: \underline{\underline{{Solution}}}$

$\sf \: First \: of \: all, we \: will \: find \: the \: circumference \: of \: the \: garden.$

$\sf \: As \: we \: know \: that,$

$\red{ \sf \: Circumference \: of \: the \: circle = 2 \pi r}$

$\sf \implies \: 2 \: \times \pi \: \times radius$

$\sf \implies \: 2 \: \times \dfrac{22}{7} \: \times 56$

$\sf \implies \: \dfrac{44}{7} \: \times 56$

$\sf \implies \: 352$

$\sf \:Circumference \: of \: the \: circular \: ground = 352 \: metre$

$\sf \: Now, we \: have \: to \: find \: the \: four \: rounds \: of \: the \: garden.$

$\sf \implies \: 352 \times 4$

$\sf \implies \: 1408$

$\sf \: Four \: rounds \: of \: the \: garden = 1408 \: metre$

$\sf \: Atlast, \: we \: will \: find \: the \: cost \: of \: four \: round \: fence.$

$\sf \implies \: 1408 \times 40$

$\sf \implies \: 56320$

$\overline{ \underline{ \boxed{ \pink{\sf \: Hence, cost \: of \: four \: round \: fence \: is \: Rs. \: 56320.}}}}$