posted by ROb .
f a water bed is 1.81 m on each vertical side and 30 cm high. Find its weight. The acceleration of gravity is 9.8 m/s2 and the density of water is 1000 kg/m3. Answer in units of N
I assume you mean each horizontal side.
= 1.81*2 * .3 * 1000*9.8 N