milk contains 5 % water . what content of pure milk should be added to 10 liters of milk to reduce this to 2 % ?
"quantity of water in 10 liters = 5 % of 10 liters = 0.5 liters let x liters of pure milk be added . then , 0.5 / ( 10 + x ) = 2 / 100 2 x = 30 x = 15 liters answer is b"
subtract(divide(multiply(divide(5, const_100), 10), divide(2, const_100)), 10)