Question

a painter is paid x rupees for painting every 10 metres of a wall and y rupees for painting every extra metre. during a week, he painted 10 metres on monday, 13 metres on tuesday, 12 metres on wednesday, 11 metres on thursday and 12 metres on friday. what is average daily earning in rupees for the five day week?

Answer 1

on monday he earned X rupee
on Tuesday he earned X +3y
on Wednesday he earned X +2y
on Thursday he earned X +y
on Friday he earned X +2y
in 5 days he earned 5x +8y
his average daily earning in rupees for the five day week is 5x+8y/5

Answer 2

Answer:

$\frac{5x+8y}{5}$

Step-by-step explanation:

Cost of painting 10 meters is x

Cost for painting every extra meters than 10 =y

On Monday he painted 10 meters

So, Cost of 10 meters = x

On Tuesday he painted 13 meters

So, Cost of 10 meters = x

Cost of extra 3 meters = 3y

Total cost for Tuesday = x+3y

On Wednesday he painted 12 meters

So, Cost of 10 meters = x

Cost of extra 2 meters = 2y

Total cost for Wednesday = x+2y

On Thursday he painted 11 meters

So, Cost of 10 meters = x

Cost of extra 1 meters = y

Total cost for Thursday= x+y

On Friday he painted 12 meters

So, Cost of 10 meters = x

Cost of extra 2 meters = 2y

Total cost for Friday= x+2y

So, Total cost = x+x+3y+x+2y+x+y+x+2y = 5x+8y

So,The total for week is 5x+8y

$Average = \frac{\text{total cost of week}}{\text{No. of days}}$

$Average = \frac{5x+8y}{5}$

Hence The average daily earning in rupees for the five day week is $\frac{5x+8y}{5}$ .