Test Academy | The length of an elastic string is a metres when the longitudinal tension is 4 N and b metres when the longitudinal tension is 5 N. The length of the string in metres when the longitudinal tension is 9 N is a-b, 5b-4a, 2b-a/4, 4a-3b

Question

The length of an elastic string is a metres when the longitudinal tension is 4 N and b metres when the longitudinal tension is 5 N. The length of the string in metres when the longitudinal tension is 9 N is

Options :

a-b
5b-4a
2b-a/4
4a-3b

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