Sarthaks Test
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Following number line shows the temperature in degree Celsius (oC) 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?

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(a) The temperature of the places marked on it is:  

PlacesTemperaturePlacesTemperature
Bangalore22oCSrinagar–2oC
Ooty14oCLahulspiti–8oC
Shimla5 oC

(b) The temperature of the hottest place Bangalore = 22oC The temperature of the coldest place Lahulspiti = –8oC Difference = 22oC – (–8oC) = 22oC + 8oC = 30o

(c) The temperature of Srinagar = –2oC The temperature of Lahulspiti = –8oC Difference = –2oC + (–8oC) = –2oC –8oC = 6oC

(d) The temperature of Srinagar and Shimla = 5oC + (–2oC) = 5oC –2oC = 3oC The temperature at Shimla = 5oC Therefore, 3oC < 5oC Thus, temperature of Srinagar and Shimla taken together is less than the temperature at Shimla. Now, Temperature of Srinagar = – 2oC Therefore, 3oC > –2oC No, it is not less than the temperature at Srinagar.

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