An aluminium rectangle measuring is heated from to

PHYSICS · Single correct · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter

Problem

An aluminium rectangle measuring 30 cm×15 cm30\,\text{cm}\times15\,\text{cm} is heated from 25 ∘C25\,^{\circ}\text{C} to 225 ∘C225\,^{\circ}\text{C}. Take βAl=48×10−6 K−1\beta_{\text{Al}} = 48\times10^{-6}\,\text{K}^{-1}. The new area of the plate is approximately (a) 452.16 cm2452.16\,\text{cm}^2 (b) 445.68 cm2445.68\,\text{cm}^2 (c) 454.32 cm2454.32\,\text{cm}^2 (d) 454.86 cm2454.86\,\text{cm}^2

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