Question

Icebergs are dangerous because
a Thick fog makes it difficult for sailors to spot them
b ninety percent of an iceberg is under water and as a result, the ships may collide
both a and b
None of these

Answer 1

Both A & B

Explanation-

the density of ice is less than the density of water thus it can easily float on water. The iceberg floats on water with only approximately 10% of its volume above the water and 90% of its volume below the water. Since such a large portion of the iceberg is submerged under water it becomes difficult for the sailor to estimate the size of the iceberg increasing the danger of the ship colliding in them.