PSLE Risa and Xandra each had a plate of dough of the same mass for making scones. The same mass of dough was used for each scone. Risa made 31 scones and had 305 g of dough left. Xandra made 13 scones and had 1.115 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 Risa and Xandra
= 31 - 13
= 18
1 kg = 1000 g
1.115 kg = 1.115 x 1000 = 1115 g
Difference between the remaining dough left by Xandra and Risa
= 1115 - 305
= 810 g
Mass of 18 scones = 810 g
Mass of 1 scone
= 810 ÷ 18
= 45 g
(b)
Total remaining dough left
= 1115 + 305
= 1420 g
Sets of 45 g
= 1420 ÷ 45
= 31 r 25
Number of scones = 31
Answer(s): (a) 45 g; (b) 31