One fourth of one third of two fifth of a number is 20. What will be40% of that number  Choose the correct choice from the following
A) 140  B) 150  C) 180  D) 240  E) 220

Rationale: explanation : ( 1 / 4 ) * ( 1 / 3 ) * ( 2 / 5 ) * x = 20 then x = 20 * 30 = 600 40 % of 600 = 240 answer : option d
Answer: D