PSLE Kylie and Usha each had a plate of dough of the same mass for making puffs. The same mass of dough was used for each puff. Kylie made 37 puffs and had 370 g of dough left. Usha made 17 puffs and had 1.17 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 Kylie and Usha
= 37 - 17
= 20
1 kg = 1000 g
1.17 kg = 1.17 x 1000 = 1170 g
Difference between the remaining dough left by Usha and Kylie
= 1170 - 370
= 800 g
Mass of 20 puffs = 800 g
Mass of 1 puff
= 800 ÷ 20
= 40 g
(b)
Total remaining dough left
= 1170 + 370
= 1540 g
Sets of 40 g
= 1540 ÷ 40
= 38 r 20
Number of puffs = 38
Answer(s): (a) 40 g; (b) 38