Mrs Chong baked 7 muffins more than cakes. Each muffin needed 0.07 kg of flour while each strudel needed 0.5 kg of flour. She used 2.09 kg more flour for the cakes than for the muffins. How many muffins did Mrs Chong bake?
| |
Cakes |
Muffins |
Difference |
| Number |
1 u |
1 u + 7 |
|
| Value |
0.5 |
0.07 |
|
| Total value |
0.5 u |
0.07 u + 0.49 |
0.43 u - 0.49 |
Amount of flour needed for muffins
= 0.07 x (1 u + 7)
= 0.07 u + 0.49
Amount of more flour for the cakes than the muffins
= 0.5 u - (0.07 u + 0.49)
= 0.5 u - 0.07 u - 0.49
= 0.43 u - 0.49
0.43 u - 0.49 = 2.09
0.43 u = 2.09 + 0.49
0.43 u = 2.58
1 u = 2.58 ÷ 0.43 = 6
Number of muffins baked
= 1 u + 7
= 6 + 7
= 13
Answer(s): 13
