# Convert $ 40^\circ C $ to Fahrenheit.

A. $ 104^\circ F $

B. $ 107^\circ F $

C. $ 117^\circ F $

D. $ 124^\circ F $

Last updated date: 22nd Mar 2023

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**Hint**: Both Celsius and centigrade are temperature scales used for measuring temperature, but Celsius is a part of the International System of Units (SI), whereas Fahrenheit is not.

So, to convert temperature from degree Celsius to Fahrenheit, we are going to use the formula

$ \Rightarrow ^\circ F = \left( {^\circ C \times 1.8} \right) + 32 $

**:**

__Complete step-by-step answer__In this question, we are given a temperature in Celsius and we need to convert that temperature in Fahrenheit.

Given temperature: $ 40^\circ C $

Temperature in Celsius is denoted by C and temperature in Fahrenheit is denoted by F.

Both Celsius and centigrade are temperature scales used for measuring temperature, but Celsius is a part of the International System of Units (SI), but whereas Fahrenheit is not.

Formula to convert Celsius to Fahrenheit:

The formula for converting temperature from Celsius to Fahrenheit is given by

$ \Rightarrow ^\circ F = \left( {^\circ C \times 1.8} \right) + 32 $

Here, we have $ ^\circ C = 40 $

Therefore, we get

$

\Rightarrow ^\circ F = \left( {^\circ C \times 1.8} \right) + 32 \\

\Rightarrow ^\circ F = \left( {40 \times 1.8} \right) + 32 \\

\Rightarrow ^\circ F = \left( {72} \right) + 32 \\

\Rightarrow ^\circ F = 104 \;

$

Therefore, on converting $ 40^\circ C $ into Fahrenheit, we get $ 104^\circ F $ .

Hence, option A is the correct answer.

**So, the correct answer is “Option A”.**

**Note**: There is a shortcut method for converting temperature from Celsius to Fahrenheit approximately.

The method is that we have to multiply the given temperature in Celsius with 2 and then add 30 to it to get the temperature in Fahrenheit.

For example: Let us convert $ 40^\circ C $ into temperature using this method.

So, if we multiply 40 with 2, we get 80 and if we add 30 to it, we get 110, which is very close to the answer (104).

Note that this method is used to find rough answers only. You cannot find the accurate answers using this method.

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