Jawapan

2016-09-29T16:33:31+08:00
TU = 90/360×2×22/7×70 = 110m
UV = 240-70-60 = 110m
VW = √(60²+80²) = 100m
WR = 140-80 = 60m
RS = 240m
ST = 140÷2 = 70m

length of fence needed = TU+UV+VW+WR+RS+ST
= 110+110+100+60+240+70 = 690m
2016-10-03T11:42:59+08:00
690m yang diperlukan untuk memagar kawasan itu