Find mass of an iron cube of side 2 cm. (Density of iron is 7.8 gm/cm 3)
62.4 gm
Topper's Approach:
Mass = 23 × 7.8 = 62.4 gm
Detailed solution:
Side of the iron cube = 2 cm
∴ Volume of the iron cube = 23 = 8 cm3
Density of iron = 7.8 gm/cm3
∴ Mass of the iron cube = 8 × 7.8 = 62.4 gmThe total surface area of a cuboid is 236 cm 2. Its length is 8 cm and height is 6 cm. Find its breadth (in cm).
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