Olympiad Test: Temperature - Class 5 MCQ

Then: 57.6° + 32° = 89.6°F

To: To convert Fahrenheit to Celsius, use the formula (F - 32) × 5/9 = C.

Applying the values: - (80 - 32) × 5/9 = 48 × 5/9 ≈ 26.67

Rounding to the nearest whole number, 26.67°C is approximately 27°C.

- This formula is derived from the relationship between the Celsius and Fahrenheit scales.
- The factor 1.8 accounts for the different sizes of degrees on the two scales.
- Adding 32 adjusts for the offset between the freezing points of water in the two systems (0°C and 32°F).
- Therefore, choice A  T_f = 1.8 × T_c +32   is correct 

Then: 19.8° + 32° = 51.8°F

First: 68° – 32° = 36°

First: 18° – 32° = –14°

(to 1 dec place)

Then: 104.04° + 32° = 136.04°F.
This is 136°F to the nearest degree

First: 101.3° – 32° = 69.3°

(41 °F – 32) × (5/9) 
=9 × (5/9) = 5 ° C

 = – 160.56°
Then: –160.56° + 32° = –128.56°F
which is –129°F to the nearest degree.

(13 ° F – 32) × (5/9) 
= – 19 × (5/9) 
= – 10.6 ° C 

Note that these are temperature changes, not actual temperatures, so we do not first subtract 32°. To change from degrees Fahrenheit to degrees Celsius, we just multiply by 5/9:

100° C × (9/5) + 32 
= 180 + 32 
= 212° F

19° C × (9/5) + 32 
= 34.2 + 32 
= 66.2° F

14°C × (9/5) + 32 = 25.2 + 32 
=57.2°F

(73 ° F –32) × (5/9) 
= 41 × (5/9)
= 22.8 ° C