PSLE Anna and Winnie each had a plate of dough of the same mass for making puffs. The same mass of dough was used for each puff. Anna made 35 puffs and had 425 g of dough left. Winnie made 17 puffs and had 1.235 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 Anna and Winnie
= 35 - 17
= 18
1 kg = 1000 g
1.235 kg = 1.235 x 1000 = 1235 g
Difference between the remaining dough left by Winnie and Anna
= 1235 - 425
= 810 g
Mass of 18 puffs = 810 g
Mass of 1 puff
= 810 ÷ 18
= 45 g
(b)
Total remaining dough left
= 1235 + 425
= 1660 g
Sets of 45 g
= 1660 ÷ 45
= 36 r 40
Number of puffs = 36
Answer(s): (a) 45 g; (b) 36