Question

step by step explanations ​

Answer 1

Explanation:

Let the coins of 20 paise be x

Let the coins of 25 paise be y

Convert RS into paise

1 rupees=100 paise

11.25 rs=11.25 ×100

= 1125 paise

By the given conditions

20x+25y=1125.............1

x+y=50.............2

Multiply eqn 2 by 20,we obtain

20x+20y=1000............3

Eqn 1 - Eqn 3

20x + 25y = 1125

20x + 20y = 1000

-. -. -

_______________

5y = 125

y = 125/5

y = 25(Put in equation 2)

x + y = 50

x + 25 = 50

x = 50-25

x = 25

Hence there are 25 coins of Rs 20 paise and 25 coins of Rs 25 paise

Hope it helps you dear.........

Answer 2

Answer:

let total coins of 20 paise be "x" and total coins of 25 paise be "y"

given total no. of coins = 50

x+y =50 ........ (1)

total amount = 11.25 rupees = 1125 paise

total money = 20(x) +25(y)

20x+25y=1125 paise.......... (2)

by solving eqn (1) and (2) we get,

y=25 and x=25