A boy has Rs 728 in denomination of Rs 2 notes,Rs 5 notes and Rs 10 notes in the ratio of 3:2:4 respectively.What is the total number of notes he has?

Explanation

Let the boy has `3x` 2 rupees notes.

Then, he will have `2x` Rs 5 notes and `4x` Rs 10 notes.

Total number of notes `= 3x+2x+4x = 9x`

Also, we are given,

`2(3x)+5(2x)+10(4x) = 728`

`=>6x+10x+40x =728=> 56x = 728`

`=> x = 13`

So, he will have total number of notes `= 9**13 = 117`