Tom had some coins. 35% of his coins were made up of 20-cent coins which was equal to the number of $1 coins. The rest of the coins were made up of 10-cent coins. Given that Tom had $8 more 20-cent coins than 10-cent coins, how many coins did Tom have altogether?
| |
10-cent |
20-cent |
$1 |
Total |
| Number |
6 u |
7 u |
7 u |
20 u |
| Value |
10 |
20 |
100 |
|
| Total value |
60 u |
140 u |
700 u |
|
35% =
35100 =
720The number of 20-cent coins and $1 coins is the same.
Number of 10-cent coins
= 20 u - 7 u - 7 u
= 6 u
$1 = 100¢
$8 x 100 = 8 x 100 = 800¢
Number of more 20-cent coins than 10-cent coins
= 140 u - 60 u
= 80 u
80 u = 800
1 u = 800 ÷ 80 = 10
Total number of coins that Tom had
= 6 u + 7 u + 7 u
= 20 u
= 20 x 10
= 200
Answer(s): 200
