Question

5. Find the volume, the total surface area and the diagonal of a cube each of whose
edges measures: (i) 2.6 cm (ii) 6.5 cm​

Answer 1

Step-by-step explanation:

volume = a^3 =2.6^3 = 17.576

T S A = 6a^2  = 6 x 2.6 x 2.6 = 40.56

C S A = 4a^2 = 4 x 2.6 x 2.6 = 27.04

Diagonal = √3 x a = 2.6√3

Now second cube

Volume = a^3 =6.5 x 6.5 x 6.5 = 274.625

T S A = 6a^2  = 6 x  6.5 x 6.5 = 253.5

C S A = 4a^2 = 4 x 6.5 x 6.5 = 169

Diagonal = √3 x a = 6.5√3