Question

4. If each edge of a cube is increased by 50%, the percentage increased in its surface area is :
(a) 50%
(b) 75%
(c) 100%
(d) 125%​

Answer 1

Answer:

option (A)

Step-by-step explanation:

let the edge of of cube =@

total surface area=6@

if the edge increased by 50%

that is edge of cube =3@/2

total surface area =6×3@/2

=9@

increased area =9@-6@=3@

increased area %=(3@/6@)×100

=50%