Question

9. In a piggy bank there are 1-and 2-rupee coins. The number of 1-rupee coins is four times the number of
2-rupee coins. If the total money in the piggy bank is 90, find the number of 1-and 2-rupee coins.
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Answer 1

Answer:

60 and 15 respectively

Step-by-step explanation:

let number of rs.1 coins be 4x and that for rs. 2 coins be x.

value of 4x rs.1 coins = 1 * 4x = 4x

value of x rs.2 coins = 2 * x = 2x

so, 4x + 2x = 90

6x = 90

x = 15

therefore, no. of rs.1 coins is 4*15 = 60

no. of rs.2 coins is 15 (answer)