Answer:
- The hikers carried 17.5 litres of water
- The Koshy family travled 34.5 km while visiting Delhi
Explanation:
1-
Multiply 1.75 liters by 10 (the number of days there were hiking) : 17.5 litres
2-
Multiply 11.5 km by 3 (the number of days visiting Delhi) : 34.5 km