6. Two marks exercise problems V

1. From a water tank $100$ litres of water is used every day. After $10$ days there is $2000$ litres of water in the tank. How much water was there in the tank before $10$ days?

 

Water in the tank before $10$ days $=$  litres

 

 

2. A dog is climbing down in to a well to drink water. In each jump it goes down $14$ steps. The water level is in $20^{\text{th}}$ step. How many jumps does the dog take to reach the water level?

 

Number of jumps the dog to reach the water $=$