PSLE Wendy and Irene each had a plate of dough of the same mass for making croissants. The same mass of dough was used for each croissant. Wendy made 36 croissants and had 310 g of dough left. Irene made 18 croissants and had 1.03 kg of dough left.
- What was the mass of dough needed for each croissant?
- With the remaining dough from both girls, how many more such croissants can be made at most?
(a)
Difference between the number of croissants made by Wendy and Irene
= 36 - 18
= 18
1 kg = 1000 g
1.03 kg = 1.03 x 1000 = 1030 g
Difference between the remaining dough left by Irene and Wendy
= 1030 - 310
= 720 g
Mass of 18 croissants = 720 g
Mass of 1 croissant
= 720 ÷ 18
= 40 g
(b)
Total remaining dough left
= 1030 + 310
= 1340 g
Sets of 40 g
= 1340 ÷ 40
= 33 r 20
Number of croissants = 33
Answer(s): (a) 40 g; (b) 33