Question

Example 19 The number of persons in
various age groups in a town is given in the
following table :
Age Group
No. of Persons
1-14
1400
15-29
1200
30-44
1100
45-59
1000
60-74
950
75-89
300
Draw a bar graph to represent the above
information and answer the following
questions :
(i) What is the percentage of youngest age
group persons over those in the oldest
age group?
(ii) Find out the population of the town in
age 1-89 these age groups.​

Answer 1

Answer:

In early production, first calcium cyanamide was converted into dicyandiamide, which was heated above its melting temperature to produce melamine. Today most industrial manufacturers use urea in the following reaction to produce melamine: 6 (NH2)2CO → C3H6N6 + 6 NH3 + 3 CO.