Following number line shows the temperature in degree Celsius (°C) at different places on a particular day: (a) Observe this number line and write the temperature of the places marked on it. (b) What is the temperature difference between the hottest and the coldest places among the above? (c) What is the temperature difference between Lahulspiti and Srinagar? (d) Can we say temperature of Srinagar and Shimla taken together is less than the temperature at Shimla? Is it also less than the temperature at Srinagar?

(a) The temperature of the places marked on it is:
Places Temperature
Bangalore 22°C
Ooty 14°C
Shimla 5°C
Srinagar -2°C
Lahulspiti -8°C
(b) The temperature of the hottest place Bangalore = 22°C
The temperature of the coldest place Lahulspiti = -8°C
Difference = 22°C – (-8°C) = 22°C + 8°C = 30°C

(c) The temperature of Srinagar = -2°C
The temperature of Lahulspiti = -8°C
Difference = -2°C + (-8°C) = -2°C-8°C = 6°C

(d) The temperature of Srinagar and Shimla =5°C +(-2°) = 5°C-2°C = 3°C
The temperature at Shimla = 5°C
Therefore, 3°C -2°C
No, it is not less than the temperature at Srinagar.

7 Maths Chapter 1 Exercise 1.1 Question 1

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