Question

17. A rectangular piece of land measures 0.8 km by 0.6 km. Each side is to be fenced with
three rows of wire. Find the length of the wire needed. If the cost of fencing is 750 per
metre, find the total cost of fencing the land.​

Answer 1

..QUESTION..

A rectangular piece of land measures 0.8 km by 0.6 km . Each side of to be fenced with three rows of wire . Find the length of the wire needed . If the cost of fencing is Rs 750 per m , find the total cost of fencing the land.

..ANSWER..

☯︎ Important hint = Three rows of wire

♧︎︎︎ Given ,

ㅤㅤㅤ➪ Length of land = 0.8 km

ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ = 800 m

ㅤㅤㅤ➪ Breadth of land = 0.6 km

ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ = 600 m

ㅤㅤㅤ➪ Cost of fencing = Rs 760 / m

߷ Perimeter of the land ✈︎

ㅤㅤㅤ➪ 2 × ( l + b )

ㅤㅤㅤ➪ 2 × ( 800 + 600 )

ㅤㅤㅤ➪ ( 2 × 800 ) + ( 2 × 600 )

ㅤㅤㅤ➪ 1600 + 1200

ㅤㅤㅤ➪ 2800

߷ Perimeter of the land = 2800 m

i.e , Length of the row of wire = 2800 m

★ We were given that , 3 Rows were placed

߷ Total rows of Wire = 3 × 2800

➪ㅤ" ㅤㅤ"ㅤㅤ"ㅤㅤ" = 8400 m

Now ,

➪ cost of fencing per m = Rs 750

➪ "ㅤ " ㅤ" 8400 m = 750 × 8400

➪ "ㅤ "ㅤ "ㅤㅤ"ㅤㅤ = 63,00,000

•°• Cost of fencing the land is Rs 63,00,000

_____________________

Give a look here ,

• FORMULAS

☯︎ Perimeter of square = 4s

☯︎ Area of square = s²

☯︎ Perimeter of rectangle = 2 ( l + b )

☯︎ Area of rectangle = l × b

ㅤㅤㅤ꧁ ʙʀᴀɪɴʟʏ×ᴋɪᴋɪ ꧂

ㅤㅤㅤ

Answer 2

Kindly Refer To The Given Attachment for your answer.

I HOPE IT HELPS.