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an elastic spring has a length l(1) when...

an elastic spring has a length `l_(1)` when tension in it is 4N. Its length is `l_(2)` when tension in it is 5N. What will be its length when tension in it is 9N?

A

`5l_(1)-4l_(2)`

B

`5l_(2)-4l_(1)`

C

`4l_(1)+5l_(2)`

D

`4l_(2)+5l_(1)`

Text Solution

Verified by Experts

The correct Answer is:
b
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