Correct Answer - Option 1 : 100 cm
GIVEN:
Diagonals of the Rhombus are 40 cm and 30 cm
FORMULA USED:
(d1/2)2 + (d2/2)2 = (Side)2
CALCULATION:
(d1/2)2 + (d2/2)2 = (Side)2
⇒ (30/2)2 + (20/2)2 = (side)2
⇒ (Side)2 = 225 + 400
⇒ Side of Rhombus = 25 cm
∴ Perimeter of Rhombus = 4 × 25 = 100 cm