A certain sum of money consists of 30 coins, some of which are 10 paisa coins and the rest are 5 paisa coins . If the total value of the coins is TK. 2 , what is the number of 10 paisa coins?
Created: 5 years ago |
Updated: 2 years ago
best des
x = number of 10 paisa coins;
y = number of 5 paisa coins .
so,x + y = 30
and x = 30 - y
ATQ,
10x + 5y = 200
Substitute for x.
10(30 - y) + 5y = 200
or,300 - 10y + 5y = 200
or, - 5y = - 100
or,y = 20
so,x = 30 - 20 = 10
∴ the number of 10 paisa coins is 10
Md Azizur Rahman
Founder of Satt
Please, contribute to add content.
Content
Related Question
View More
Created: 5 years ago |
Updated: 8 months ago
Created: 5 years ago |
Updated: 2 years ago
Created: 5 years ago |
Updated: 2 years ago
Promotion
Download Our Mobile Apps
