Question

the surface area of a cube is equal to the sum of the surface area of the Other cube whose edge 3 cm 4 cm and 12 cm find the age of the first cube

Answer 1

surface area of cube

$6 {a}^{2}$
S.A of 1st cube 6×9=54
" " 2nd. " "=6×16=96
3rd. =6×144=864



So acc to question 54+96+864 =1014

$6 {a}^{2} = 1014$
a=13cn