Children wanted to make a recycling water system to water the magic garden. We thought of using the waste water from the kitchen to water the plant since so much of water is daily used to wash the vessels, clean vegetables etc. To know the amount of water used daily for the kitchen we need to know the volume of the tank. Kavitha told that the volume of the kitchen tank was 2000 L.

To make sure of what we know already we measured the height and circumference of the cylindrical tank in order find the volume of the tank.

**Measure height:**

- To measure the height of the tank we used a bamboo stick.
- Children marked the height of the tank on the bamboo stick.

**Measure Circumference to determine radius:**

- We used thread to know the circumference.

Children took the thread around the circular shaped ring and marked on the thread.
- The challenging part was we was not able to find the measuring tape. Then we came up with an idea to use the metre scale chiildren already used.

We found that the height of the tank was approx 3 m and Circumference to be around 3.14 m.

Through this we found out that the radius was half a meter.

Finally we found out that the tank volume was approximately 2355 L.

This might be an error with calculating the circumference of the circle because we found the distance outside the ring and not inside.

Measuring the circumference of the circle with the one meter scale and the left over part was measured using a 30 cm scale

From Left: Ajay, Gurumoorthy, Pravin, Kalai

Children measuring the length of the bamboo stick to measure the height of the tank. They used the same thread to measure the length. They marked 3 m on the thread in order to do this

Children calculating the volume of the tank