Question

34 answer plz anyone plz​

Answer 1

volume of cube=s^3

ratio of sides of cubes=3:4:5

side length of first cube=3x(s1)

then volume=(3x)^3=27x^3(v1)

side length of second cube=4x(s2)

then volume=(4x)^3=64x^3(v2)

side length of third cube=5x

then volume =(5x)^3=125x^3(v3)

sum of volumes of cubes=216×4096cm^3

v1+v2+v3=216×4096

27x^3+64x^3+125x^3=216×4096

216x^3=216×4096

x^3=4096

x=3√4096

x=16

side length of thirf cube=5x

5x=5×16

=80cm

side length of large cube is 80cm.