There were some bottles and packets. A bottle weighed 4 kg and a packet weighed 1 kg more. The total weight of the bottles was 39 kg heavier than the total weight of the packets. The number of bottles and packets were in the ratio 7 : 3. What was the total weight of the bottles and the packets?
|
Bottles |
Packets |
Total |
Heavier |
Number |
7 u |
3 u |
|
|
Value |
4 |
5 |
|
|
Total value |
28 u |
15 u |
43 u |
13 u |
Weight of 1 packet
= 4 + 1
= 5 kg
Total weight of the bottles heavier than the total weight of the packets
= 28 u - 15 u
= 13 u
13 u = 39
1 u = 39 ÷ 13 = 3
Total weight of the bottles and packets
= 28 u + 15 u
= 43 u
= 43 x 3
= 129 kg
Answer(s): 129 kg