Question

length,breadth and height of a cuboid shape box of medicine is 20 cm , 12 cm and 10 cm respectively. find the surface area of vertical faces and totally surface area of this box

Answer 1

total surface area=2(lb+bh+lh)
then put the valued u got ur ans...
hope it helps

Answer 2

$Solution:$

i. Surface area of vertical faces of the box

= 2(l + b) x h

= 2(20+ 12) x 10

= 2 x 32 x 10

= 640 sq.cm.

ii. Total surface area of the box

= 2 (lb + bh + lh)

= 2(20 x 12+ 12 x 10 + 20 x 10)

= 2(240 + 120 + 200)

= 2 x 560

= 1120 sq.cm.

∴ The surface area of vertical faces and total surface area of the box are 640 sq.cm, and 1120 sq.cm, respectively.

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