'If the length of the diagonal of a square is 20 cm, then its perimeter must be`10sqrt

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"If the
length of the diagonal of a square is 20 cm, then its perimeter must be
`10sqrt(2)c m`
(b) `40 c m`
(c) `40sqrt(2)c m`
(d) `200\ c m`"
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Proper cutting tan kr dinde kiven kitti bad

tarvindersingh