Question

Soham painted the outside of the cabinet of measure 1.5 m x 3 m x 2.5 m. How much surface area
did he cover if he painted all except the bottom of the cabinet?

snap I'd : khushikhyat3165​

Answer 1

Explanation:

Answer

Total surface area of cabinet =2(lb+bh+hl)

=2[(1)(2)+(1)(1.5)+(2)(1.5)]

=13

Area of base cabinet =lb=2

Surface area painted =13−2=11m

Answer 2

Explanation:

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lateral surface area of cabinate will be 2(l+b)h

$\Rightarrow$2(1.5+3)2.5

$\Rightarrow \: 2 \times 4.5 \times 2.5 \\ \Rightarrow \: 4.5 \times 5 \\ \Rightarrow \: 22.5 {m}^{2}$

now,area of roof of cabin is

$\boxed{l \times b}$

$\Rightarrow \: 1.5 \times 3 = 4.5 {m}^{2}$

so area of cabin painted,will be

$lateral \: surface \: area \: of \: cabbin \\ + \\ area \: of \: the \: roof \: of \: cabin \\ i.e \: \: \: \: \: \: 22.5 + 4.5 = 27 {m}^{2}$