A snail covers a distance of $100\ metres$ in $50\ hours$. Calculate the average speed of snail in km/h.

As given, distance covered $=100\ m=100\times 10^{-3}\ km=0.1\ km$

Time $=50\ h$

Therefore, the average speed of the snail $=\frac{distance}{time}$

$=\frac{0.1\ km}{50\ h}$

$=0.002\ km/h$

Therefore, the average speed of the snail is $0.002\ km/h$.