Review the key concepts, formulae, and examples before starting your quiz.
🔑Concepts
Water is the primary necessity for life; the chemical representation of water is .
In ancient times, people built 'Stepwells' or 'Baolis', which are deep wells with steps on all sides so that people could reach the water level directly.
Ghadsisar was a famous system in Jaisalmer where interconnected lakes were built to collect rainwater so that water was available throughout the year.
Traditional water harvesting systems include 'Johads' (earthen check dams) and 'Tankas' (underground tanks built inside houses to store rainwater).
Rainwater harvesting is the process of collecting and storing rainwater for future use rather than letting it run off, helping to recharge the groundwater level.
Customs and festivals are often related to water, such as the celebration in Uttarakhand where a new bride bows to the spring or pond.
📐Formulae
💡Examples
Problem 1:
A village traditional tank has a capacity of . During the summer, of water were used. How much water is left in the tank? Solve using vertical subtraction.
Solution:
Explanation:
To find the remaining water, we subtract the used quantity () from the total capacity (), resulting in .
Problem 2:
A school building collects rainwater from two different roof sections. Section A collects and Section B collects . What is the total water harvested?
Solution:
Explanation:
By adding the water collected from both sections (), we determine that the total harvested water is .
Problem 3:
If a family saves of water every day by using a bucket instead of a shower, how much water will they save in ?
Solution:
Explanation:
Multiplying the daily savings () by the number of days () gives a total saving of .