Question

How much wire is required to to fence a rectangular field 1km long and 500m broad

Answer 1

ᴊᴜꜱᴛ ꜰɪɴᴅ ᴛʜᴇ ᴩᴇʀɪᴍᴇᴛᴇʀ ᴏꜰ ᴛʜᴇ ꜰɪᴇʟᴅ
2(ʟ+ʙ)
2(1000+500)
2×1500ᴍᴇᴛʀᴇ
3000ᴍᴇᴛʀᴇ

Answer 2

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✔✔YOUR ANSWER ⏭
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The fencing is to be done on the boundaries of the rectangular field.
Hence the total length of the wire required will be equal to the perimeter of rectangular field.
so,

$length \: of \: wire = 2(l + b) \\ = > 2(1000 + 500) \\ = > 2 \times 1500 \\ = > 3000 \: m \\ = > \frac{3000}{1000} km \\ = > 3 \: km$