Question

3 copper cube are melted to form a single cube the side of these cubes are 5cm 4cm and 3cm find the surface area of the new cube

Answer 1

Answer:

melted -----> volume

5^3 + 4^3 + 3^3

125 + 64 + 27

216

A^3 = 216

A = 6cm

side of the new cube is 6cm

TSA = 6a^2

= 6 × 6 × 6

= 216 cm^2