Question

2) Aftab observed that the normal temperature of Bengaluru

during a month was 210C. On a particular day, the

changes in temperature as compared with the normal

temperature were as follows:

Morning : 5 am: –50 C ; 10 am: + 50 C;

After noon : 12 noon: + 70 C

Evening : 5 pm: + 20 C

Help Aftab to find the actual temperature at 5 am, 10 am,

12 noon and 5pm.

Answer 1

Changes in temperature are given positive (+) or negative (-) values




A positive value means it is above the normal temperature


A negative value means it is below the normal value




Morning: 

5 am: –50 + 210 C = 16 degrees Celsius 

10 am: + 50 + 21 C = 26 degrees Celsius



After noon

12 noon: + 70  + 21 = 28 degrees Celsius


Evening: 

5 pm: + 20 + 21 = 23 degrees Celsius