Question

9: Each edge of a cube is increased by
50%. Then the percentage increase in its
surface area is
(a) 125%
(b) 150%
(6) 175% (d) 180%​

Answer 1

B) 150 PERCENT.......

Answer 2

Answer:

let the, cubes sides be x

then, surface area= 6x^2

now, after increment, sides=x×150/100=3x/2

now, surface area = 6 × 9x^2/4=54x^2/4= 13.5x^2

increment = 13.5-6= 7.5

now, % increment= 7.5/6×100

= 125%