Answer:
Anand can afford is 6hours
Explanation:
Let H represent the whole number of hours that the plumber works. 
 
given that the fixed cost is $65 
 
and the hourly cost is $28 
 
also given that Anand has a total of $250 with him 
 
the total cost can be expressed in terms of the number of hours H as 
 
250=65+28H 
 
we can now solve for H 
 
250-65=28H 
 
185=28H 
 
divide both sides by 28 
 
H=185/28 
 
H=6.60714285714 
 
"The plumber only charges for a whole number of hours." 
 
So the number of hours Anand can afford is 6hours