```

Work = force x displacement

```

In this case, the force is the weight of the box, which is given by:

```

force = mass x gravity

```

where the mass is 30 kg and gravity is approximately 9.8 m/s^2.

Therefore, the force required to lift the box is:

```

force = 30 kg x 9.8 m/s^2 = 294 N

```

The displacement is the height to which the box is lifted, which is 1 m.

Therefore, the work done in lifting the box is:

```

Work = 294 N x 1 m = 294 J

```

Therefore, it will take 294 J of work to lift the 30-kg box a height of 1 m.