A, B and C together earn Rs. 1,200 per day, while A and C together earn Rs. 577. If B and C together earn Rs. 743, what is the daily earning of C?

In an unseeded 5-day BOD test of domestic wastewater, 6 mL of wastewater is added to a 300 mL BOD bottle. The initial dissolved oxygen (DO) is 8 mg/L and after 5 days the DO is 4 mg/L. Compute the 5-day BOD of the wastewater.

A Self-Help Group of 12 women contributed 200 Rupees each monthly for 10 months. They earned 4,000 Rupees from internal lending interest and received a Revolving Fund of 15,000 Rupees under DAY-NRLM. What is the total corpus and the maximum Cash Credit (CC) limit allowable under the 6-times rule?