//Problem 4.07:

//initializing the variables:
mdt1 = 1000; // in lb/min
mdt2 = 1000; // in lb/min
mdt3 = 200; // in lb/min

//calculation:
mdt5 = mdt1 + mdt2 - mdt3
mdt6 = mdt2
mdt = mdt5 - mdt6

printf("\n\nResult\n\n")
printf("\n amount of water lost by evaporation is %.0f lb/min",mdt)