120 , 1/2 cubes in order to fill the entire cube
You could make a small (easily repaired) leak and watch it for the amount of time you need to conclude what you need to.
9xπ ft³
The volume (V) of a cylinder is calculated using the formula
V = area of base × height
The volume of the oblique cylinder is the same as the volume of the right cylinder
Tilting the cylinder over does not change the volume, imagine tilting a tin of beans, the volume is unchanged
V = 9xπ ft³
Let's get the data out of the problem:
d = 38.4 km
t = 6 h
Now, we can apply in this equation and find his speed:
v = d / t
v = 38.4 / 6
v = 6.4 km/h
Joe has a speed of 6.4 km/h.
Hope it helps.
