Question

Find the surface area of cube ‘A’ and lateral surface area of cube 'B
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Answer 1

Given :

• side of the cube 'A' is 10cm
• side of the cube 'B' is 8cm

To find :

(a) the surface area of cube ‘A’

(b) lateral surface area of cube 'B

Solution :

(a) Surface area of cube = 6a²

surface area of cube 'A' = 6(10)²

= 6(100) = 600cm.

(b) lateral surface area of cube = 4a²

lateral surface area of cube 'B' = 4(8)²

= 4(64) = 256cm.

$\therefore$The surface area of cube ‘A’ is 600cm and lateral surface area of cube 'B' is 256cm.

Some related formulas :

➝ volume of cube = a³

➝ TSA of cuboid = 2(lb + bh + hl)

➝ LSA of cuboid = 2h(l + b)

➝ TSA of cylinder = 2πr(r + h)

➝ LSA of cylinder = 2πrh

➝ TSA of cone = πr(l + r)

➝ LSA of cube = πrl