Question

th the same
An edge of a cube is increased by 10%. Find the percentage by which the
area of the cube has increased.
cm. Find its surface area
ICBSE SP​

Answer 1

Answer:

edge = a

SA=6a^2

10%. increase ax110/loo=1.1a

SA=6a^2 = 6a^2 = 6x1.1^2

= 6x1.21a^2 = 7. 26 a^2

increase in SA=1.26a2

% increase = 1.26a2xloo/6a^2

= 2l %