Paul wants to add new mulch to the top of all five garden beds. the new mulch will be 10 centimetres (cm) deep. about how much new mulch will paul need for this job?

There are no given dimensions of the garden bed, so the answer could only be given in terms of the depth. Since 5 gardens require the new mulch, we multiply this to 10. Thus, Pauls needs 50 cm deep new mulch for all five garden beds.