The total mass of 7 bags of brown rice and 5 packets of ground pepper was 38 kg. Each packet of ground pepper was 2 kg lighter than each bag of brown rice.
- What was the mass of 1 bag of brown rice?
- What was the mass of 1 packet of ground pepper?
(a)
Mass of a packet of ground pepper = 1 u
Mass of a bag of brown rice = 1 u + 2
7 x (1 u + 2) + 5 x 1 u = 38
7 u + 14 + 5 u = 38
7 u + 5 u = 38 - 14
12 u = 24
1 u = 24 ÷ 12 = 2
Mass of 1 bag of brown rice
= 2 + 2
= 4 kg
(b)
Mass of 1 packet of ground pepper = 1 u = 2 kg
Answer(s): (a) 4 kg; (b) 2 kg