Question

Sunny have a total of 4500 in coins of * 2, 5 and 10. The number of * 2 coins is 5 times the number of 5 coins. The total number of coins is 540. How many coins of 10 are with him?
phirends ?​

Answer 1

Answer:

number of the 10 rupee coin is 420

Step-by-step explanation:

(2×5x) +5x+10y=4500;15x+10y=4500

6x+y=540; 60x+10y=5400

45x=900

x=900/45=20

y=540-(6×20)=540-120=420

Answer 2

Answer:

Let the number of 5 rupee coin be x, so it's value is 5x

Hence, number of 2 rupee coin is 5x and value is 10x

Total number of coins is 90. So, Number of 10 rupee coin is 90-x-5x. Value of 10 rupee coin is 10(90-x-5x)= 900–60x

Total value of all coins is 450. Hence,

5x+10x+900–60x= 450

=> 45x = 900–450

=> x= 450/45=10

So number of 5 rupee coin is 10

Number of 2 rupee coin is 5*10= 50

Number of 10 rupee coin is 90–10–50= 30

Step-by-step explanation:

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