Let's convert both measurements to the same unit to compare them:

* 3.5 M: "M" stands for meters.

* 35 cm: "cm" stands for centimeters.

There are 100 centimeters in 1 meter. So:

* 3.5 M = 3.5 * 100 cm = 350 cm

Now we can compare:

* 350 cm is greater than 35 cm.

Therefore, 3.5 M is not less than 35 cm.