1.

Length of a rectangular tank is twice its breadth. If the depth of the tank is 3 m and area of its four walls is 108m2 , find the length of the tank.

Answer»

Let breadth of the tank be x.

∴ Length of the tank = 2x. 

Area of the walls of the tank = 2(length + breadth) × depth.

∴ 108 = 2(2x + x)× 3 

∴ 108 = 18 x ∴ x = 6 ∴ 2x = 12 

∴ Length of the tank = 12m.

tan R = PQ / QR = 3/4



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