Question

find the total surface area of a cuboid whose length, breadth and height are respctively 7cm 5cm and 3cm

Answer 1

Answer:

The total Surface area of a cubiod = 2(LW+WH+HL)

= 142 Sq.cm

Answer 2

★ Given:-      

• → Length of a cuboid = 7 cm
• → Breadth of a cuboid = 5 cm
• → Height of the cuboid = 3 cm

★ To find:-        

• → The total surface area of a cuboid

★ Solution:-        

☯ On putting the values:

$\qquad\sf{:\implies\:Total\:surface\:area\:_{(CUBOID\:)}\:=\:2\:(LB\:+\:BH\:+\:HL)}$

$\qquad\sf{:\implies\:Total\:surface\:area\:_{(CUBOID\:)}\:=\:2\:(7\:\times\:5\:+\:5\:\times\:3\:+\:3\:\times\:7)}$

$\qquad\sf{:\implies\:Total\:surface\:area\:_{(CUBOID\:)}\:=\:2\:(35\:+\:15\:+\:21)}$

$\qquad\sf{:\implies\:Total\:surface\:area\:_{(CUBOID\:)}\:=\:2\:(50\:+\:21)}$

$\qquad\sf{:\implies\:Total\:surface\:area\:_{(CUBOID\:)}\:=\:2\:(71)}$

$\qquad\sf{:\implies\:Total\:surface\:area\:_{(CUBOID\:)}\:=\:142\:cm^{2}}$

$\therefore\underline{\bf{The\:total\:surface\:area\:of\:the\:cuboid\:is\:142\:cm^{2}\:.}}$

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