Question

manan piggy bank is full of coin with total money of ₹460 the coin are of the denomination ₹ 2, ₹5, ₹10 the number of ₹5 coins is 2 times the number of ₹ 2 coins the total number of coin is 100 find the number of ₹ 10 coins in the piggy bank​

Answer 1

Step-by-step explanation:

let's take 2rs coin as x ,

5rs : 2rs = 2x : x = 3x

10 rs coin = 100- 3x

( 100-3x)10 + (5*2x)+ 2x = 460

1000-30x +10x +2x = 460

1000-18x = 460

540 = 18x

x = 30

total number of 10rs coins ,

100 - 3x = 100 - 3(30) = 10 coins