Question

2 cubes have their volume ratio 1:27.find ratio of surface area

Answer 1

(a1)^3/(a2)^3=(1/27)

(a1)/(a2)=(1/3)

a2=3a1

surface area of cube of side a is 6a

hence,

6(a1)/6(a2)=(6a1)/(18a1)=1/3

ratio of surface ara is 1:3