The total mass of 7 packets of rice flour and 4 packets of flour is 173 kg. Each packet of rice flour has a mass of 19 kg.
- What is the total mass of 7 packets of rice flour?
- What is the total mass of 4 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 rice flour and flour be R and F respectively.
Let 1 packet of rice flour be 1 R.
Let 1 packet of flour be 1 F.
7 R + 4 F = 173
1 R = 19
Mass of 7 packets of rice flour
= 7 x 19
= 133 kg
(b)
Mass of 4 packets of flour
= 173 - 133
= 40 kg
(c)
Mass of 1 packet of flour
= 40 ÷ 4
= 10 kg
Answer(s): (a) 133 kg; (b) 40 kg; (c) 10 kg