Question

A metal wire is in the shape of a square whose side is 84 m. It is then re-bent into a rectangle of
width 21 m. Find its length.

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Answer 1

Answer:

Length = 146m

Step-by-step explanation:

We know that,

Perimeter of Metal Square = Perimeter of Metal Rectangle (Since, It is the same wire that makes up both these figures.)

So,

4 * Side = 2(l+ w)

4 * 84 = 2L + 2W

336 = 2L + 2W

336 = 2L + 2 * 21 (Since, width is 21m)

336 = 2L + 42

336 - 42 = 2L

294 = 2L

294/2 = L

146m = L