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प्रश्न
Rukhsar painted the outside of the cabinet, of measure 1 m × 2 m × 1.5 m. How much surface area did she cover if she painted all except the bottom of the cabinet?
उत्तर
Length (l) of the cabinet = 2 m
Breadth (b) of the cabinet = 1 m
Height (h) of the cabinet = 1.5 m
Area of the cabinet that was painted = lb + 2(bh + hl)
= 2 × 1 + 2(1 × 1.5 + 1.5 × 2)
= 2 + 2(1.5 + 3.0) = 2 + 2(1.5 + 3.0)
= 2 + 9.0
= 11m2
Hence, surface area required for paint = 11m2
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