Question # At what temperature, both Celsius and Fahrenheit scale read the same value:

# At what temperature, both Celsius and Fahrenheit scale read the same value:

(B) ( 130^{circ} )

(C) ( 60^{circ} )

(D) ( -40^{circ} )

Solution

(f=frac{9}{5}(C)+32 )

Retth'blo fehrenticit 4 "C if let at at x temp. Gop Shows the same reading

[

begin{array}{l}

begin{aligned}

Rightarrow x=frac{9}{5}(x)+32 Rightarrow 5 x &=9 x+160

=4 x=-160

{x}=-40 & text { in }So required is-40^{circ} mathrm{c}

end{aligned}

end{array}

]

option (d)