20. A field in the shape of an equilateral triangle with side 225 m is fenced with three rounds of rope. Another field, rectangular in shape, of length 200 m and breadth 125 m is fenced with two rounds of rope. Which field requires more rope and by how much?
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perimeter of triangle =225×3=675m
length of rope used =675×3=2025m
perimeter of the rectangular field=2×(200+125)=650m
length of rope used=650×2=1300
so, more rope is used in triangle by 2025-1300=725m
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Answer:
length of equilateral triangle field=225m
length of rectangular field=200m
breadth of rectangular field=125m
total length of rope required in ∆ field=3side=3*225=675m
length of rope required in rectangular field=2(l+b)=2(200+125)=650m
equilateral field required much rope than rectangular fields by 25m.
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