Suppose, the temperature in Moscow was –8°C at 10 AM on 6 December. Twenty-four hours later, it was 12°C higher. What was the temperature at 10 AM on 7 December?

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Solution

Ans. 4° C
Explanation: The temperature at 10 AM on 7 December in Moscow would be 4°C because the temperature went 12°C higher than temperature at 10 am on 6th December, i.e. (-8°C). So we have to add 12°C in -8°C Therefore, -8°C +12°C = 4°C

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On a particular day, the temperature of Delhi at $10$ am was $13^{0} C$ but by the midnight, it fell down to $6^{0} C$ . The same day the temperature in Chennai at $10$ am was $18^{0} C$ but fell down to $10^{0} C$ by the midnight. Which fall is greater?

Q. Question 81(i)

As part of his science project, Prithvi was supposed to record the temperature every hour on Saturday from 6 AM to midnight. At noon, he was taking lunch and forgot to record the temperature. At 8:00 PM, his favourite show came on and so forgot again. He recorded the data so collected on a graph sheet as shown below.

Why does it make sense to connect the points in the situation?

Q. Question 81(ii)

As part of his science project, Prithvi was supposed to record the temperature every hour on Saturday from 6 AM to midnight. At noon, he was taking lunch and forgot to record the temperature. At 8:00 PM, his favourite show came on and so forgot again. He recorded the data. So, collected on a graph sheet as shown below.

Describe the overall trend, or pattern, in the way the temperature changes over the time period shown on the graph.

In July, the average temperature in one US city was $29 ° C$ . By December, the average temperature had fallen by $29 ° C$ . Explain why the average temperature in December was $0 ° C$ .

Q. At midnight the temperature was 21 . Two hours later, it was 3 colder. What was the temperature them?

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Suppose, the temperature in Moscow was –8°C at 10 AM on 6 December. Twenty-four hours later, it was 12°C higher. What was the temperature at 10 AM on 7 December?

Ans. 4° CExplanation: The temperature at 10 AM on 7 December in Moscow would be 4°C because the temperature went 12°C higher than temperature at 10 am on 6th December, i.e. (-8°C). So we have to add 12°C in -8°C Therefore, -8°C +12°C = 4°C

Ans. 4° C
Explanation: The temperature at 10 AM on 7 December in Moscow would be 4°C because the temperature went 12°C higher than temperature at 10 am on 6th December, i.e. (-8°C). So we have to add 12°C in -8°C Therefore, -8°C +12°C = 4°C