"If the   length of the diagonal of a square is 20 cm, then its perimeter must be `10sqrt(2)c
Channel: Doubtnut
Date: 2020-07-05

"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`"