Question

- Find the lateral surface area, total surface area and the volume of the following cylinders: {a} Radius = 4.2 cm, Height = 12 cm {b} Diameter = 10 m, Height = 7 m , {c} Diameter = 6 cm, Height = 1.4 cm, {d} Radius = 56 cm, Height = 2 m

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Answer 1

Answer:

Sol. Volume of each cube = 64 cm3        ∴ Total volume of the two cubes = 2 × 64 cm3              = 128 cm3        Let the edge of each cube = x        ∴ x3 = 64 = 43        ∴ x = 4 cm        Now, Length of the resulting cuboid l = 2x cm              Breadth of the resulting cuboid b = x cm              Height of the resulting cuboid h = x cm        ∴ Surface area of the cuboid = 2 (lb + bh + hl) = 2[(2x . x) + (x . x) + (x . 2x)]              = 2[(2 × 4 × 4) + (4 × 4) + (4 × 2 × 4)] cm2              = 2 [32 + 16 + 32] cm2 = 2[80] cm2 = 160 cm2.

Step-by-step explanation:

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