our calculation

we try to calculate the boyancy force of the raft ..


the weight of our bamboo raft:
 the bamboo radius =4cm=4x10-2m
height=2.2m
there is 7 bamboo that we used
 volume of cylinder = 1/27x r2 x7
                             =1/27x(4x10-2)2x 2.2 x7
                             =0.7774m3


volume tyre :0.14137m3


volume of dome used : h=1.2m ,r=1x10-2m
                                 : 1/27x (1x10-2)2x 24x
                                 :9.0478x10-3m3
total volume:0.9278 m3
                   :927.8178dm3
                   :927.8178 l


0.96kg=1l , 890.71kg


our weight= 60+47+46=153kg


total weight  :1043.71 kg


the law of water displacement:
weight of object =the volume of water displaced


the total water displaced is 1087.2 l