The quantity d t/Q for conduction of heat through a body i.e. spherica

1.	The quantity d t/Q for conduction of heat through a body i.e. spherical in shape is
A.	ln (r<sub>2</sub>/r<sub>1</sub>)/2‚âà√¨‚àö√ëLk
B.	ln (r<sub>2</sub>/r<sub>1</sub>)/‚âà√¨‚àö√ëLk
C.	ln (r<sub>2</sub>/r<sub>1</sub>)/2Lk
D.	ln (r<sub>2</sub>/r<sub>1</sub>)/2‚âà√¨‚àö√ëk
Answer» C. ln (r<sub>2</sub>/r<sub>1</sub>)/2Lk

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The quantity d t/Q for conduction of heat through a body i.e. spherical in shape is

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