Usha wanted to buy some cupcakes and biscuits. The cost of a cupcake was
17 the cost of a biscuit. A set of 7 cupcakes and 2 biscuits cost $14.70. What was the total amount Usha had to pay for 3 cupcakes and 8 biscuits?
| |
Cupcakes |
Biscuits |
Total |
| Number |
7 |
2 |
|
| Value |
1 u |
7 u |
|
| Total value |
7 u |
14 u |
21 u |
Total cost of cupcakes and biscuits
= 7 u + 14 u
= 21 u
21 u = 14.7
1 u = 14.70 ÷ 21 = 0.7
Cost of 3 cupcakes and 8 biscuits
= 3 x 1 u + 8 x 7 u
= 3 u + 56 u
= 59 u
= 59 x 0.7
= $41.30
Answer(s): $41.30
