Question

A piggy bank contains only 2 and 1 rupee of coins.there are five times as many one rupee of coin as there are 2 rupee of coins.if all the money in the piggy bank adds up Rs.105, find the numbers of 1 rupee of coins.

Answer 1

consider that there are x two rupees.
if it is so, there will be 5x one rupees.
solve equation.

x+5x=105
6x=105
x=17.5
5x=17.5(5)
5x=87.5
Here, we can see there is one 0.5. This will be 0.5 in one rupees
17.5 ones,+ a half.
=18
 
Ans: 18