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Ex.1.1 Q3 Integers - NCERT Maths Class 7

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Question

In Srinagar, temperature was \(–5^\circ \rm C\) on Monday and then it was dropped \(2^\circ \rm C\) on Tuesday. What was the temperature of Srinagar on Tuesday? On Wednesday it rose up by \(4^\circ \rm C.\) What was the temperature on this day?

 Video Solution
Integers
Ex 1.1 | Question 3

Text Solution

What is known?

Different days and their respective temperatures.

What is the unknown?

The temperature of Srinagar on Tuesday and Wednesday. 

Reasoning:

Steps:

Temperature of Srinagar on Monday\(= \,–5^\circ \rm C\)

On Tuesday it  was dropped by \(2^\circ \rm C\)

Temperature on Tuesday

\[\begin{align}&= -5^\circ \rm C - 2^\circ  \rm C \\ &={{\rm -7^\circ C}}\end{align}\]

On Wednesday it rose up by \(4^\circ \rm C\)

Temperature on Wednesday

\[\begin{align}&= -7^\circ \rm C\,{\rm{ + }}\,{\rm{4^\circ C}}\\&={\rm{   -3^\circ C}}\end{align}\]

Thus, temperature on Tuesday was \(–7^\circ \rm C\) and on Wednesday was \(–3^\circ \rm C.\)

  
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