The temperature of a city at $1$ pm was $15 °$ $C$ . Every hour it decreases by $3 ° C$ . What would be the temperature of the city at $6$ pm.

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Solution

Finding the temperature at $6$ pm.
Temperature of the city at $1$ pm $= 15 ° C$ .
Decrease in temperature per hour $= 3 ° C$ .
Decrease in temperature in next $5$ hours $= 5 \times 3 ° C = 15 ° C$
Hence, temperature of the city at $6$ pm $= 15 ° C - 15 ° C = 0 ° C$

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Take the data giving the minimum and the maximum temperature of various cities given in the following table:

Temperatures of the cities as on 20.6.2006
City	Max.	Min.
Ahmedabad	38 ºC	29 ºC
Amritsar	37 ºC	26 ºC
Banglore	28 ºC	21 ºC
Chennai	36 ºC	27 ºC
Delhi	38 ºC	28 ºC
Jaipur	39 ºC	29 ºC
Jammu	41 ºC	26 ºC
Mumbai	32 ºC	27 ºC

Plot a double bar graph using the data and answer the following:

(i) Which city has the largest difference in the minimum and maximum temperature on the given date?

(ii) Which is the hottest city and which is the coldest city?

(iii) Name two cities where maximum temperature of one was less than the minimum temperature of the other.

(iv) Name the city which has the least difference between its minimum and the maximum temperature.

Q. The temperature in each city was noted at 3 pm on 16 January 2008.

(1) Which place had the highest temperature at 3 pm? Which place is the coolest at that time?
(2) How much higher is the temperature in Mumbai from that in Srinagar?
(3) How many degrees will the temperature need to rise for it to reach 40°C in Thiruvananthapuram?
(4) How much lower is the temperature of Kolkata from that in Chennai?
(5) The temperature in these cities was also noted at 3 am on the same day. Look at the table and answer the questions.
(a) Which place had the lowest temperature at 3 am? Imagine yourself to be there and describe how it would feel.
(b) What is the difference between the temperatures at 3 pm and 3 am in Chennai? In Bhopal?

City	Temperature at 3 am
Chennai	21.1
Mumbai	19.0
Th'puram	21.6
Kolkata	13.1
Bhopal	9.8
Srinagar	1.3
Guwahati	12.8
Jaipur	10.2

At city A temperature was – 7°C on Tuesday and then it dropped by 3°C on Wednesday. What was the temperature of the city on Wednesday? If on Thursday it rose by 5°C compared to Wednesday, what will be the temperature then?

Q. Solve this
Q. The temperature of a city is 4

°

C. Next day the temperature of the city is 5

°

C. What is the temperature of the city next day?

The temperature of a city at $12$ 'O clock is $20 ° C$ , every hour it rises by $2 ° C$ , what is the temperature at $5 p m$ ?

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The temperature of a city at 1pm was 15°C. Every hour it decreases by 3°C. What would be the temperature of the city at 6pm.

Finding the temperature at 6 pm.Temperature of the city at 1pm=15°C.Decrease in temperature per hour=3°C.Decrease in temperature in next 5 hours=5×3°C=15°CHence, temperature of the city at 6 pm=15°C-15°C=0°C

The temperature of a city at $1$ pm was $15 °$ $C$ . Every hour it decreases by $3 ° C$ . What would be the temperature of the city at $6$ pm.

Finding the temperature at $6$ pm.
Temperature of the city at $1$ pm $= 15 ° C$ .
Decrease in temperature per hour $= 3 ° C$ .
Decrease in temperature in next $5$ hours $= 5 \times 3 ° C = 15 ° C$
Hence, temperature of the city at $6$ pm $= 15 ° C - 15 ° C = 0 ° C$