Zara spent
38 of her money on 3 folders and 8 rulers. The cost of one ruler was thrice the cost of one folder. She bought some more rulers with
13 of her remaining money. How many rulers did Zara buy altogether?
3 folders and
8 rulers |
Remaining amount |
| 3x3 |
5x3 |
| |
More rulers |
Left |
| |
1x5 |
2x5 |
| 9 p |
5 p |
10 p |
Cost of 1 folder = 1 u
Cost of 1 ruler = 3 u
Cost of 3 folders = 3 x 1 u = 3 u
Cost of 8 rulers = 8 x 3 u = 24 u
Total cost of 3 folders and 8 rulers
= 3 u + 24 u
= 27 u
9 p = 27 u
1 p = 27 ÷ 9 = 3 u
Amount that Zara used to buy more rulers
= 5 p
= 5 x 3 u
= 15 u
Number of more rulers that Zara bought
= 15 u ÷ 3 u
= 5
Total number of rulers that Zara bought
= 8 + 5
= 13
Answer(s): 13
