Question

pls solve it....surface area and volumes​

Answer 1

Answer:

Let let the ages of the three cubes be 3x + 4 x + 5 x respectively

show volume of 3 cubes = 3 x cube + 4 x cube + 5 x cube equals 216 x cube cm cube

therefore volume new cube =volume of three cubes

a^3=216x^3

a=6x

diagonal of a new cube equals 12 root 3 cm

root a^2+a^2+a^2=12root3cm

root3a=12root3

a=12

×=2

therefore3×2=6; 4×2=8 therefore the ages of three cubes are eight 10 6 respectively