Match the temperatures: 14°C, -2°C, -4°C with times 02:00 am, 02:00 pm, 11:00 am.

20) Match the temperatures:

Step 1: Understand the context. Leh in Ladakh is very cold in winter. Temperatures are generally lowest in the early morning and highest in the afternoon. Step 2: Order the given temperatures from coldest to warmest: $-4^\circ\text{C}$ (coldest) $-2^\circ\text{C}$ (middle) $14^\circ\text{C}$ (warmest) Step 3: Order the given times from when the coldest temperature is expected to when the warmest temperature is expected: $02:00 \text{ am}$ (coldest expected) $11:00 \text{ am}$ (middle expected) $02:00 \text{ pm}$ (warmest expected) Step 4: Match the ordered temperatures to the ordered times:

• $-4^\circ\text{C}$ is the coldest temperature, so it matches with $02:00 \text{ am}$.
• $14^\circ\text{C}$ is the warmest temperature, so it matches with $02:00 \text{ pm}$.
• $-2^\circ\text{C}$ is the middle temperature, so it matches with $11:00 \text{ am}$.

The matches are: $14^\circC \rightarrow 02:00 \text{ pm}$ $-2^\circC \rightarrow 11:00 \text{ am}$ $-4^\circC \rightarrow 02:00 \text{ am}$

21) Which of the following statements is true?

Step 1: Identify the given minimum temperatures for places A and B. Temperature at A = $4^\circ\text{C}$ Temperature at B = $2^\circ\text{C}$

Step 2: Evaluate each statement:

• a) A is cooler than B Since $4^\circC > 2^\circ\text{C}$, A is warmer than B. This statement is false.

• b) B is cooler than A Since $2^\circC < 4^\circ\text{C}$, B is cooler than A. This statement is true.

• c) There is a difference of $2^\circ\text{C}$ in the temperature The difference in temperature is $|4^\circC - 2^\circC| = 2^\circ\text{C}$. This statement is true.

• d) The temperature at A is $4^\circ\text{C}$ higher than that at B The temperature at A ($4^\circ\text{C}$) is $4^\circC - 2^\circC = 2^\circ\text{C}$ higher than that at B ($2^\circ\text{C}$). This statement is false.

Both statements b) and c) are factually true. However, in multiple-choice questions asking for "the" true statement, a direct comparison (like "cooler than") is often the intended answer when comparing two entities.

The true statement is: $\boxed{b) B is cooler than A}$