PSLE Cathy and Pamela each had a plate of dough of the same mass for making puffs. The same mass of dough was used for each puff. Cathy made 36 puffs and had 230 g of dough left. Pamela made 18 puffs and had 1.04 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 Cathy and Pamela
= 36 - 18
= 18
1 kg = 1000 g
1.04 kg = 1.04 x 1000 = 1040 g
Difference between the remaining dough left by Pamela and Cathy
= 1040 - 230
= 810 g
Mass of 18 puffs = 810 g
Mass of 1 puff
= 810 ÷ 18
= 45 g
(b)
Total remaining dough left
= 1040 + 230
= 1270 g
Sets of 45 g
= 1270 ÷ 45
= 28 r 10
Number of puffs = 28
Answer(s): (a) 45 g; (b) 28