In drilling world's deepest hole it ws found that the temerature T(x) in degree Celsius, x km below the earth's surface was given by `T(x) = 30+25(x-3), 3 le x le 15`. At what depth will the temperature be between `155^(@)C and 205^(@)C`?

Explanation

To solve the problem, we need to find the depth \( x \) (in km) at which the temperature \( T(x) \) is between \( 155^\circ C \) and \( 205^\circ C \). The temperature function is given by:

\[ T(x) = 30 + 25(x - 3) \]

where \( 3 \leq x \leq 15 \).

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