Step-by-step explanation:
To find the current in the outer coil, so the arrangement will be:
=

therefore
=

cross multiply to find

=
(
) (
)
=7.1 (180/140)(0.021/0.011)
= 17.4A
For the two magnet to have opposite direction, so the current in the outer coil definitely that current must have an opposite direction to that current(in the outer coil.