Question

25 horses eat 5 bags of corn in 12 days , how much will 10 horses eat in 18 days ?

Answer 1

it is compound variation.
no. of horses                 no.of bags                  no of days
       25                               5                                  12
       10                              y                                    18
  
                              y=10*5*18/25*12
                              y=900/300
                              y=3 bags

Answer 2

no of the horse =25 eat the cron =5 total no of days =12 = 10×5×18/25×12 = 900/300 = 3 bags