A sum of Rs. 36.90 is rnade up of 180 coins which are either 10 paise

1.	A sum of Rs. 36.90 is rnade up of 180 coins which are either 10 paise coins or 25 paise coins. The numbeof 10 paise coins is:
Answer» Total number of coins = 180 Letx be number of 10pcoins andy be number of 25pcoins x+y=180-----(i) Step (ii)Given 10p coins and 25p coins make the sum = Rs. 36.90 10x/100+25y/100=36.90 10x+25y=3690-----(ii) Step (iii) Solving (i) and (ii), 10x+10y=1800 10x+25y=3690 y=126 x=54

A sum of Rs. 36.90 is rnade up of 180 coins which are either 10 paise coins or 25 paise coins. The numbeof 10 paise coins is:

Answer»

Total number of coins = 180

Letx be number of 10pcoins andy be number of 25pcoins

x+y=180-----(i)

Step (ii)Given 10p coins and 25p coins make the sum = Rs. 36.90

10x/100+25y/100=36.90

10x+25y=3690-----(ii)

Step (iii)

Solving (i) and (ii),

10x+10y=1800

10x+25y=3690

y=126

x=54