On celcius scale the temperature of body increases by 40^° C . The increase in temperature on Fahrenheit scale is:

Correct answer: (C) 72^° F. Since (F-32)/9=C/5 ⇒ Δ C=5/9 Δ ~F ⇒ 40=5/9 Δ ~F ⇒ Δ ~F=72^° F

Q96 / 100 · BITSAT 2024 (Memory Based Paper 1) · Physics

On celcius scale the temperature of body increases by $40^{\circ} \mathrm{C}$. The increase in temperature on Fahrenheit scale is:

A
$70^{\circ} \mathrm{F}$
B
$68^{\circ} \mathrm{F}$
Correct answer
C
$72^{\circ} \mathrm{F}$
D
$75^{\circ} \mathrm{F}$

Solution

Since $\frac{F-32}{9}=\frac{C}{5}$ $\Rightarrow \Delta \mathrm{C}=\frac{5}{9} \Delta \mathrm{~F}$ $\Rightarrow 40=\frac{5}{9} \Delta \mathrm{~F} \Rightarrow \Delta \mathrm{~F}=72^{\circ} \mathrm{F}$

Hence, the correct answer is option: 'C'.

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