Question

15. Find the side of a square whose perimeter is 100 cm.
16. Find the cost of fencing a square park of side 300m at the rate of Rs 20 per meter.
​

Answer 1

15. Perimeter of the square = 100 cm

Therefore, side = (100÷4) cm

= 25 cm.

16. Side of the park = 300 m

Therefore, perimeter = (4×300) m

= 1200 m

Cost of fencing the park = Rs. (1200×20)

= Rs. 24,000

Answer 2

$\mathfrak{\huge{\underline{Answer:}}}$

$\textbf{\underline{\underline{Question\:1 :}}}$

$\implies$ Find the side of a square whose perimeter is 100 cm.

$\textbf{\underline{\underline{Solution\:1 :}}}$

$\implies$ Given Perimeter = 100 cm

[ We know That Perimeter of Square : 4×Side ]

$\sf \: Perimeter = 4 \times side$

$\sf \: 100cm = 4 \times side$

$\sf \: side = \dfrac{100}{4}$

$\boxed{\boxed{Side\:=25\:cm}}$

$\textbf{\underline{\underline{Question\:2 :}}}$

$\implies$ Find the cost of fencing a square park of side 300m at the rate of Rs 20 per meter.

$\textbf{\underline{\underline{Solution\:2 :}}}$

$\implies$ Given Side of Square Park = 300 m

[ Perimeter = 4×Side ]

$\sf \: Perimeter = 4 \times 300$

$\sf \: Perimeter = 1200$

Given Cost of Fencing = Rs 20/metre

According To Question :

$\sf \:Cost \: Of \: Fencing = 1200 \times 20$

$\underline{\underline{Rs\:24000}}$