Question

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.​

Answer 1

Step-by-step explanation:

let the no. of one rs. coins - x

and, let the no. of two rs. coins - 4x( because 1 rupees coins are four times)

total no. of coins are =90

x + 4x = 90

5x = 90

x = 90/5

x = 45

so no. of one rupee coins = x=45

and, no. of two rupee coins = 4x = 4*45 = 180

Answer 2

Step-by-step explanation:

Let the no. of 2 rupee coin be x

then let the no. of 1 rupee coin be 4x

According to the questiom

(4x × 1) + ( x × 2 ) = 90

= 4x + 2x = 90

= 6x = 90

= x = 90/6 = 15

= x = 90/6 = 15

Number of 1 rupees coin = x = 15

Number of 2 rupees coin = 4x = 4 × 15 = 60