PSLE Xylia and Tina each had a plate of dough of the same mass for making puffs. The same mass of dough was used for each puff. Xylia made 36 puffs and had 380 g of dough left. Tina made 20 puffs and had 1.1 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 Xylia and Tina
= 36 - 20
= 16
1 kg = 1000 g
1.1 kg = 1.1 x 1000 = 1100 g
Difference between the remaining dough left by Tina and Xylia
= 1100 - 380
= 720 g
Mass of 16 puffs = 720 g
Mass of 1 puff
= 720 ÷ 16
= 45 g
(b)
Total remaining dough left
= 1100 + 380
= 1480 g
Sets of 45 g
= 1480 ÷ 45
= 32 r 40
Number of puffs = 32
Answer(s): (a) 45 g; (b) 32