OCR M1 forces question.

At first place the question says that the forces are horizontal and then it says that the angle between them is 60^o. I get the answer according to the Mark Scheme by using 60^o angle. But just wanted to confirm if that's a typo in the question?

The angle between any two horizontal things is always like 0^o OR 180^o...

If someone pushes you from behind, and someone pushes you from the side, both forces are horizontal, but they're not 0 or 180 degrees apart.

Oops, so the question was talking in 3 dimensions, right?

You don't need three dimesions; you only need two, it's just that they are both horizontal: Forwards & backwards, left & right.