PSLE Shiyun and Marion each had a plate of dough of the same mass for making scones. The same mass of dough was used for each scone. Shiyun made 39 scones and had 435 g of dough left. Marion made 21 scones and had 1.065 kg of dough left.
- What was the mass of dough needed for each scone?
- With the remaining dough from both girls, how many more such scones can be made at most?
(a)
Difference between the number of scones made by Shiyun and Marion
= 39 - 21
= 18
1 kg = 1000 g
1.065 kg = 1.065 x 1000 = 1065 g
Difference between the remaining dough left by Marion and Shiyun
= 1065 - 435
= 630 g
Mass of 18 scones = 630 g
Mass of 1 scone
= 630 ÷ 18
= 35 g
(b)
Total remaining dough left
= 1065 + 435
= 1500 g
Sets of 35 g
= 1500 ÷ 35
= 42 r 30
Number of scones = 42
Answer(s): (a) 35 g; (b) 42