=  d (250x – 5x^{2})  = 0 = 250 – 10x = 0 
dx 
So, in 1% of days =  12 
10 
35% remaining days in city =  12  × 35 = 42 
10 
In 1% of day remaining, he can spend =  46  of budget 
55 
Therefore, % decrease reqd. = 

× 100 = 30.33%  
12  
10 
2 × 40% + 1 × 37.5  = 39.17% 
3 
=  30  (2x + 29 × 10) = 6240 
2 
T =  {  50  (0.01) +  30  (0.008) +  20  (0.007)  } 
100  100  100 
=  T  (0.88) 
100 

=  = 0.2727  
24  

88  