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प्रश्न
Find the area of metal-sheet required to make an open tank of length = 10 m, breadth = 7.5 m and depth = 3.8 m.
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उत्तर
Length of the tank = 10 m
Breadth of the tank = 7.5 m
Depth of the tank = 3.8 m
Area of four walls = 2[L+B] × H = 2(10 + 7.5) × 3.8
= 2 × 17.5 × 3.8 = 35 × 3.8 = 133 m2
Area of the floor = L × B = 10 × 7.5 = 75 m2
Area of metal sheet required to make the tank = Area of four walls + Area of floor = 133 m2 + 75 m2 = 208 m2
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