Q80 / 90 · JEE Main 2024 (04 Apr Shift 1) · Physics

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

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

Solution

We know that per ${ }^{\circ} \mathrm{C}$ change is equivalent to $1.8^{\circ}$ change in ${ }^{\circ} \mathrm{F}$. $\therefore 40^{\circ}$ change on celcius scale will corresponds to $72^{\circ}$ change on Fahrenheit scale. Hence option (3)

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

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