Calculate the distance covered by a body after 15 seconds, given the formula s = 2.45t2 m.

The distance $s$ covered by the body after time $t$ was found to be:

$$s = 2.45 t^2 \text{ m}$$

$$s = 2.45 (15 \text{ s})^2$$ $$s = 2.45 (225 \text{ s}^2)$$ $$s = 551.25 \text{ m}$$

The distance covered after 15 seconds is $\boxed{551.25 \text{ m}}$.