The length of an elastic string is a metre when the longitudinal tensi – McqOptions

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1.	The length of an elastic string is a metre when the longitudinal tension is 4 N and b metre when the longitudinal tension is 5 N. The length of the string in metre when the longitudinal tension is 9 N is [EAMCET 2001]
A.	\[a-b\]
B.	\[5b-4a\]
C.	\[2b-\frac{1}{4}a\]
D.	\[4a-3b\]
Answer» C. \[2b-\frac{1}{4}a\]

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