Question

rectangular piece of land measuring 7m by 5m .each side is to be fenced with four rows of wires how much wire is needed

Answer 1

2(l+b)
2*12
24
for one row 48m then for four rows = 96

Answer 2

p = 2×( l+b)
= 2×( 7m+5m )
= 2×12
= 24

each side is to be fenced with four rows of wires wire is needed =4×24=96