Find the area of a rhombus whose side is 6 cm and whose altitude is 4 cm. If one of its diagonals is 8 cm long, find the length of the other diagonal.

Area of rhombus = Base × Altitude

= 6 × 4 = 24 cm²

Also, Area of rhombus = 1/2 × d’ × d’’

⇒ 24 = 1/2 × 8 × d’’

⇒ d’’ = 6 cm

Hence, the length of the other diagonal is 6 cm.