Question

a rectangular piece of land measures 0.8 km by 0.6 km. Each side is to be fenched with three rows of wire. Find the length of the wire needed. if the cost of the fencing is 50 rs. per metre. find the total cost of the fencing land.

Answer 1

length=0.8 km
breadth =0.6 km
perimeter=2(l+b)
=2(6+8)
=2(12)
=24=2.4
3row=24×3=72=7.2 m
1m=50 re
72m=50×72= 360 re
360re because there is no value 0after decimal point

Answer 2

Given:

Sides = 0.8 km × 0.6 km

Perimeter = 2 ( l + b )

=》 2 ( 0.8 + 0.6 )

=》 2 ( 1.4 )

=》 2.8 km

Total wire needed if 3 rows are required = 2.8 × 3

=》 $\textbf{Total wire needed = 8.4 km}$

Cost = Rs. 50 per metre

8.4 km in m = 8400 m

Cost = 8400 × 50

=》 $\textbf{Cost = Rs. 420000}$