There were some packets and bottles. A packet weighed 4 kg and a bottle weighed 3 kg more. The total weight of the packets was 21 kg heavier than the total weight of the bottles. The number of packets and bottles were in the ratio 7 : 3. What was the total weight of the packets and the bottles?
|
Packets |
Bottles |
Total |
Heavier |
Number |
7 u |
3 u |
|
|
Value |
4 |
7 |
|
|
Total value |
28 u |
21 u |
49 u |
7 u |
Weight of 1 bottle
= 4 + 3
= 7 kg
Total weight of the packets heavier than the total weight of the bottles
= 28 u - 21 u
= 7 u
7 u = 21
1 u = 21 ÷ 7 = 3
Total weight of the packets and bottles
= 28 u + 21 u
= 49 u
= 49 x 3
= 147 kg
Answer(s): 147 kg