Question

Q20. A lady has 5 Rs. and 50-paisa coin in her purse she has a total amount Rs 50 Form a linear equation in two variables and find its two solutions.​

Answer 1

Answer:

Step-by-step explanation:

Let x and y be the number of 50-paisa and 25-paisa coins respectively. Then  x + y = 50 ……….(i)  

0.5x + 0.25y = 19.50 ………(ii)  

Multiplying (ii) by 2 and subtracting it from (i),

we get  0.5y = 50 - 39  ⇒ y = 11/0.5 = 22  

Subtracting y = 22 in (i), we get  x + 22 = 50  ⇒ x = 50 – 22 = 28  

Hence, the number of 25-paisa and 50-paisa coins is 22 and 28 respectively.

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Answer 2

Given

• Lady have Rs.5 and 50-paisa coin in her purse.
• Total amount Rs 50

To Solve

• Linear equation in two variables and find its two solutions.

Solution

• let the number of Rs.5 and 50-paisa coin be x and y.

→5x + 0.5y =50

→x+0.1y=10

• There is only one Equation can Formed by your given Question.