Question 35

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waecmaths question: 

A messenger was paid N2.50  an hour during the normal working hours and N4.00 an hour during overtime. If he received N31.00 for 10 hours works, how many hours are for the overtime?

Option A: 

Option B: 

3

Option C: 

4

Option D: 

6

waecmaths solution: 

$\begin{align}  & \text{Let the number of hours for normal working be }x \\ & \text{The number of hours of overtime be }y \\ & x+y=10---(i) \\ & 2.50x+4y=31--(ii) \\ & \text{solving }(i)\text{ and (ii) gives }x=5\text{ and }y=4 \\ & \text{The hours for overtime is 4 hours} \\\end{align}$

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