PSLE Julie and Dana each had a plate of dough of the same mass for making puffs. The same mass of dough was used for each puff. Julie made 39 puffs and had 390 g of dough left. Dana made 23 puffs and had 1.03 kg of dough left.
- What was the mass of dough needed for each puff?
- With the remaining dough from both girls, how many more such puffs can be made at most?
(a)
Difference between the number of puffs made by Julie and Dana
= 39 - 23
= 16
1 kg = 1000 g
1.03 kg = 1.03 x 1000 = 1030 g
Difference between the remaining dough left by Dana and Julie
= 1030 - 390
= 640 g
Mass of 16 puffs = 640 g
Mass of 1 puff
= 640 ÷ 16
= 40 g
(b)
Total remaining dough left
= 1030 + 390
= 1420 g
Sets of 40 g
= 1420 ÷ 40
= 35 r 20
Number of puffs = 35
Answer(s): (a) 40 g; (b) 35