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Question


The charges for a graphics designer is partially fixed and partially variable with the number of hours. The charge is Rs.550 for 4.5 hours and Rs.300 for 2 hours. Find the charges of 1 hour?


Options:
A .   100 
B .   200 
C .   300 
D .   400 
Answer: Option B
:
B

The total charge = Fixed component +Variable component


Z= F+kx


Where F and x are fixed


550 =F +k(4.5)


300=F + k(2)


 


Solving simultaneously, F= 100 and k= 100


Charges for 1 hour = 100 +1(100) =200



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