Question

8/A rectangular piece of plot measures 0.6 km by 0.5 km. Each side is to be fenced with
5 rows of wires. What is the length of the wire needed? If the wire costs 9 per metre,
what will be the cost of the wire required for fencing?
9. Ranjan walks around a rectangular park of length 60 m and breadth 40 m and Smita walks
around a square park of side 55 m. Both take 3 rounds each. Who walks more distance and
by how much?
1. A rectangular piece of land is to be fenced for an exhibition. The length of the exhibition land
is 250 m and its breadth is 200 m. We need to keep an entrance of 10 m and an emergency
axit of 5 m If the cost of this snecial fencing is 175 ner metre what will he the total cost​

Answer 1

Answer:

1) Length = 0.6 km

Breadth = 0.5 km

Perimeter =2( length+ breadth)

= 2(0.6+0.5)

=2(1)

= 2 km

Each side is to be fenced with 5 rows of wires.

So , the perimeter will be 5(2) = 10 km

Cost of fencing per meter = Rs. 9

Total cost of fencing = 10×9

= Rs. 90

2) Length of rectangular park = 60 m

Breadth of rectangular park = 40 m

Perimeter =2(60+40)

=2(100)

=200 m

Ranjan walks 3 times around the park , then the

distance travelled by him = 200×3

= 600 m

Side of a park =55 m

Perimeter =4× length of any Side

= 4×55

=220 m

Smita walks 3 times around the square park , then

the distance travelled by her = 220×3

=660 m

Here , If we compare the distances travelled by

both , Smita travelled more Distance than Ranjan.

i.e., 220-200

= 20 m.

3) Length = 250 m

Breadth =200 m

Perimeter = 2(250+200)

=2(450)

= 900 m

Fencing can't be made in the entrance and exit.

So the length would be removed.

i.e., 900- (10+5)

= 900-15

= 885.

Cost of fencing per meter = 175

Total cost of fencing = 885×175

=Rs. 1,54,875