PSLE Kathy and Erika each had a plate of dough of the same mass for making muffins. The same mass of dough was used for each muffin. Kathy made 31 muffins and had 105 g of dough left. Erika made 11 muffins and had 1.005 kg of dough left.
- What was the mass of dough needed for each muffin?
- With the remaining dough from both girls, how many more such muffins can be made at most?
(a)
Difference between the number of muffins made by Kathy and Erika
= 31 - 11
= 20
1 kg = 1000 g
1.005 kg = 1.005 x 1000 = 1005 g
Difference between the remaining dough left by Erika and Kathy
= 1005 - 105
= 900 g
Mass of 20 muffins = 900 g
Mass of 1 muffin
= 900 ÷ 20
= 45 g
(b)
Total remaining dough left
= 1005 + 105
= 1110 g
Sets of 45 g
= 1110 ÷ 45
= 24 r 30
Number of muffins = 24
Answer(s): (a) 45 g; (b) 24