The ratio of length and breadth of a cuboidal tank is 2 : 1 and its height is 5m. The area of 4 walls is 210m², then its volume is:-

490 m³ 576 m³ 475 m³ 525 m³

490 m³

Length : Breadth = 2 : 1 Area of 4 walls = 2 h (l + b) ⇒ 210 = 2 × 5 (2R + 1R) ⇒ R = 7 Dimensions = (2 × 7), (1 × 7), 5                    = 14 m, 7 m, 5 m Volume of cuboid = lbh = 14 × 7 × 5 = 490 m3