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Welcome to this episode of our new series "Crash Course” .
In this session Kriti ma’am will be taking a session on complete chapter 18 “Wastewater Story” of class 7 in 20 minutes. Not only this, at the end of the session, she will give you 10 Most Important objective questions as homework.
So, what are you waiting for? Come join the session.
We at BYJU'S always strive to give you the best. Add this video to your study plans to score more in Exam!"

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