A solid metal cube of side 10cm is heated from 10°C to 60°C. lf the linear expansivity of the metal is 1.2 x 10^5K−¹, calculate the increase in its volume.

A. 0.6cm³
B. 1.2 cm³
C. 1.8 cm³
D. 3.6 cm³
E. 6.0cm³

Correct Answer:

Option C – 1.8 cm³

Explanation

Δv = 3αvΔθ = 3 x 1.2 x 10^-5 x 1000 X (60 – 10)

= 1.8cm