# Advanced chem

posted by
**Momito**
.

A rectangular block of wood is 40cm wide, 60cm long and 30cm deep. If its relative density is 0.7 and it floats with its 30cm side verticle, determine: (a)the length of the block above the water surface and (b)the minimum force required to completely submerge the block.

Please show your working so i can understand