ratio between rahul and deepak is 4 : 3 , after 6 years rahul age will be 18 years . what is deepak present age ?
"present age is 4 x and 3 x , = > 4 x + 6 = 18 = > x = 3 so deepak age is = 3 ( 3 ) = 9 answer : d"
divide(multiply(subtract(18, 6), 3), 4)