The total mass of 7 packets of bread flour and 5 packets of flour is 221 kg. Each packet of bread flour has a mass of 18 kg.
- What is the total mass of 7 packets of bread flour?
- What is the total mass of 5 packets of flour?
- If each bag of flour has the same mass, what is the mass of 1 packet of flour?
(a)
Let the mass of 1 packet of bread flour and flour be B and F respectively.
Let 1 packet of bread flour be 1 B.
Let 1 packet of flour be 1 F.
7 B + 5 F = 221
1 B = 18
Mass of 7 packets of bread flour
= 7 x 18
= 126 kg
(b)
Mass of 5 packets of flour
= 221 - 126
= 95 kg
(c)
Mass of 1 packet of flour
= 95 ÷ 5
= 19 kg
Answer(s): (a) 126 kg; (b) 95 kg; (c) 19 kg