Page 137 - Math Skill - 5

Time and Temperature 135

Example 2: Convert 131°F to °C.

Solution: Given F = 131°F
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We know that, C = (F – 32) = (131 – 32) = × 99 = 55°C
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Exercise 10.4

1. Convert into degree Fahrenheit.
(a) 20°C (b) 35°C (c) 25°C (d) 30°C
2. Convert into degree Celsius.

(a) 77°F (b) 95°F (c) 113°F (d) 167°F

ASSESSMENT TIME

COMPETENCY BASED QUESTIONS
A. Multiple-Choice Questions
1. Sanjay started playing a video game at 4:30 p.m. When the game was over, he looked at
his watch which showed 5:15 p.m. How long did the game last?

(a) 1 hour, 45 minutes (b) 1 hour, 15 minutes (c) 45 minutes
2. Convert 70°C into °F

(a) 158°F (b) 149°F (c) 165°F
3. Convert 41°F into °C

(a) 15°C (b) 10°C (c) 5°C
4. The freezing point of water in degree fahreaheit is:

(a) –32°F (b) 0°F (c) 32°F
5. What is 2 hours and 45 minutes expressed in just minutes?

(a) 180 minutes (b) 165 minutes (c) 150 minutes

B. Fill in the Blanks
1. The boiling point of water is __________ °C.
2. The normal human body temperature is __________ °C.

3. There are __________ equal divisions on Fahrenheit scale.
4. There are __________ equal divisions on Celsius scale.

SKILL BASED QUESTIONS
C. Case Study
The air lines timing from New Delhi to Lucknow are as follows. There are some incomplete bars, so
complete the table first then answer the following questions.