If 10 trains can transport 180 tonnes of goods in 10 days, how many trains are required to transport 135 tonnes of goods in 5 days? (3 marks)
If 10 trains can transport 180 tonnes of goods in 10 days, how many trains are required to transport 135 tonnes of goods in 5 days? (3 marks)
Let the number of required trains be x.
Trains
Goods
Days
10
180
10
x
135
5
Since, the goods are more, then more trains are required to transport. So it is direct proportion, the multiplying factor is 135/180.
(1 mark)
Again if less days, less number of trains required. So it is also a direct proportion, the multiplying factor is 5/10.
(1 mark)
x=10×(135/180)×(5/10)=3.75
(1 mark)
Let the number of required trains be x.
| Trains | Goods | Days |
| 10 | 180 | 10 |
| x | 135 | 5 |
Since, the goods are more, then more trains are required to transport. So it is direct proportion, the multiplying factor is 135/180.
(1 mark)
Again if less days, less number of trains required. So it is also a direct proportion, the multiplying factor is 5/10.
(1 mark)
x=10×(135/180)×(5/10)=3.75
(1 mark)
