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Question

Followingnumber 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 the temperature of Srinagar and Shimla have taken together is less than the temperature at Shimla? Is it also less than the temperature at Srinagar?

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Solution

(a)By observing the given data, the temperatures of these cities are as follows.

Lahaul Spiti

:

−8°C

Srinagar

:

−2°C

Shimla

:

5°C

Ooty

:

14°C

Bangalore

:

22°C

(b)Temperature at the hottest place, i.e., Bangalore = 22°C

Temperature at the coldest place, i.e., Lahulspiti = −8°C

Temperature difference = 22°C − (−8°C)

= 30°C

Therefore, the temperature difference between the hottest and the coldest places is 30ºC.

(c)Temperatureat Lahulspiti = −8°C

Temperature at Srinagar = −2°C

Temperature difference = −2°C − (−8°C)

= 6°C

Therefore, the temperature difference between Lahulspiti and Srinagaris 6ºC.

(d)Temperatureat Srinagar = −2°C

Temperature at Shimla = 5°C

Temperature of Srinagar and Shimla taken together = −2°C +5°C

= 3°C

3°C < 5°C

3°C < Temperature of Shimla

Yes, the temperature of Srinagar and Shimla have taken together is less than the temperature of Shimla.

However, 3°C > −2°C

**Hence, the temperature of Srinagar and Shimla have taken together is not less than the temperature of Srinagar.**

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