Two rods, one hollow and the other solid...

Two rods, one hollow and the other solid, made of the same material have the same length of 20 cm and radius of 2 cm. When their temperature is increased through the same amount of `50^(@)C`, their expansion ratio Eh : Es will be :

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Two rods, one hollow and the other solid, made of the same material have the same length of 20 cm and radius of 2 cm. When their temperature is increased through the same amount of `50^(@)C`, their expansion ratio Eh : Es will be :

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