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Air Pollution-1 (in Hindi)
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Definitions, Types of Pollutants,etc.

Manan Kathuria
Voracious reader, passionate educator(have taught more than 1 lac civil services aspirants), Founder-eKaksha(youtube)

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Unacademy user
last question mein ratio wala step smj nhi aaya sir
Vaibhav Dasgupta
2 years ago
actually chatan sir ans was right, but writing mistaken in the last question, the ratio will be (3x-6)/(31x-22)=1/13, after solved x=7, That's mean 3x=3*7=21. ok.. Thanks you! chetan sir. sir please make another previous question for tire 2. Thank you!