A man has ₹480 in the denominations of 1 rupee notes , 5 rupee notes and 10 rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has

Let number of notes of each denomination be N.
According to question,
A man has ?480 in the denominations of 1 rupee notes , 5 rupee notes and 10 rupee notes.
Total value of notes = 480
1 x N + 5 x N + 10 x N = 480
⇒ N + 5N + 10N = 480
⇒ 16N = 480
⇒ N= 30.
Hence, total number of notes = 3N = 3 x 30 = 90