engineering recuitment HPCL Engineer Mock Test 2024 Environmental Engineering Solid Waste Management

अवायवीय अपघटन के लिए S/D अनुपात का इष्टतम मान ________ है।

1

0 - 10

2

10 &qcf;dtqix; 20

3

20 &qcf;dtqix; 30

4

30 &qcf;dtqix; 40

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