A caterpillar climbs up a one-meter wall. For every 2 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Calculate the speed at which the caterpillar travels in cm/s.

If the caterpillar goes up 2cm then slips down 1cm, it only got 1 cm

The poor caterpillar had to crawl 3m to get up 1m.

average speed = distance travelled / time taken

average speed = 3m / 10 minutes

average speed = 0.33 m / minutes

or

average speed = (9 x 2 cm) / (10 minutes)

average speed = (198 cm) / (600 sec)

average speed = 0.33 cm/sec