Physics · Thermal Properties of Matter
An aluminium and a steel rod, having the same initial lengths and cross-sections at 30°C, are joined end-to-end to make a composite rod of total length 120 cm. The coefficients of linear expansion of aluminium and steel are 24 × 10-6/°C and 1.2 × 10-5/°C respectively. The length of this composite rod when its temperature is raised to 100°C is _____ cm.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1120.20
- 2120.15✓
- 3120.03
- 4120.06
Correct answer
120.15
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