Question

If each edge of a cube is incyeased by 50%, the percentage increase in the
surface area is
(a) 50%
(b) 75%
(C) 100%
(d) 125%​

Answer 1

ANS--A

Let the length of one side be 2 cm

Then surface area=6*2*2=24 sq cm

After 50% increase the side becomes 3 cm

Then surface area=6*3*3=54

Percentage increase=(54-24)/24*100=30/24*100=125%

Answer 2

Answer:

optation ( D ) is correct answer.

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