If force $(\overrightarrow F ) = 4\hat i + 5\hat j$ and displacement $(\overrightarrow s ) = 3\hat i + 6\hat k$ then the work done is
$4 \times 3$
$5 \times 6$
$6 \times 3$
$4 \times 6$
If force $(\overrightarrow F ) = 4\hat i + 5\hat j$ and displacement $(\overrightarrow s ) = 3\hat i + 6\hat k$ then the work done is
$W = \vec F\;\vec S$$ = (4\hat i + 5\hat j)(3\hat i + 6\hat j) = 12$