Question

22.
There are 15 desks in a classroom and 3 students can sit on a desk. How many rooms
are needed to accommodate 3420 children?
na​

Answer 1

Answer:

Silver bromide is known for its unusual photo- sensitivity and this property has caused it to become the basis of photographic materials in modern times. In presence of light, silver bromide undergoes decomposition giving silver which is grey in colour. Thus, the correct answer is B.

Answer 2

Answer:

73 classrooms is the answer