Mrs Lin baked 7 cookies more than swiss rows. Each cookie needed 0.07 kg of flour while each strudel needed 0.4 kg of flour. She used 1.16 kg more flour for the swiss rows than for the cookies. How many cookies did Mrs Lin bake?
| |
Swiss Rows |
Cookies |
Difference |
| Number |
1 u |
1 u + 7 |
|
| Value |
0.4 |
0.07 |
|
| Total value |
0.4 u |
0.07 u + 0.49 |
0.33 u - 0.49 |
Amount of flour needed for cookies
= 0.07 x (1 u + 7)
= 0.07 u + 0.49
Amount of more flour for the swiss rows than the cookies
= 0.4 u - (0.07 u + 0.49)
= 0.4 u - 0.07 u - 0.49
= 0.33 u - 0.49
0.33 u - 0.49 = 1.16
0.33 u = 1.16 + 0.49
0.33 u = 1.65
1 u = 1.65 ÷ 0.33 = 5
Number of cookies baked
= 1 u + 7
= 5 + 7
= 12
Answer(s): 12
