A spring is stretched by 3cm when a load...

A spring is stretched by 3cm when a load of `5.4 × 10^(6)` dyne is suspended from it. Work done will be-

`8.1 xx 10^(6) J`

`8.1 xx 10^(6)J`

`8.0 xx 10^(6)` erg

`8.1 xx 10^(6)` erg

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