Question

a milkman sell milk at 5rupes for a litter he loses 200rupess but when he sell it at 6rupess he gain 150rupess how much milk did he purchase

Answer 1

$200 \div 5 = 40$
then he sell at 6rupess
and gain 150..then he sell
$150 \div 6 = 25$
he perches 25litter milk.