A toy is made with seven equal cubes of sides 7 cm. Six cubes are join

1.	A toy is made with seven equal cubes of sides 7 cm. Six cubes are joined to sixfaces of a seventh cube. Find the total surface area of the toy.
Answer» We know,Surface area of cube = 6(side)^2 As one face of six faces of all six cubes are joined to face of seventh cube then only five faces of six cubes form the surface of toy Therefore,Total surface area of toy= 6[5side^2]= 6[5root(7)^2]= 6(5*7)= 210 cm^2

A toy is made with seven equal cubes of sides 7 cm. Six cubes are joined to sixfaces of a seventh cube. Find the total surface area of the toy.

Answer»

We know,Surface area of cube = 6*(side)^2

As one face of six faces of all six cubes are joined to face of seventh cube then only five faces of six cubes form the surface of toy

Therefore,Total surface area of toy= 6*[5*side^2]= 6*[5*root(7)^2]= 6*(5*7)= 210 cm^2