The difference in temperature between two bodies is 30 degree centigrade. What is the difference in degree Fahrenheit?

54

The correct answer is option 2. 54.

To convert from degrees Celsius to degrees Fahrenheit, you can use the formula:

\[ F = \frac{9}{5}C + 32 \]

Given that the difference in temperature between two bodies is 30 degrees Celsius, we can find the difference in degrees Fahrenheit by multiplying 30 by \( \frac{9}{5} \) and then adding 32.

\[ \Delta F = \frac{9}{5} \times 30 = 54 \]

So, the difference in degrees Fahrenheit is 54.

Therefore, the correct answer is 54.