Avi can finish a piece of work in 6 days, Avni can finish it in 8 days, Aarti can do it in 12 days and Reeta can do it in 16 days. They all decided to work one by one, Avi starts the work and works for one-fourth of a day, then Avni works for one-fourth of a day, then Aarti works for one-fourth of a day and then Reeta works for the remaining one-fourth of a day. The cycle is repeated till the work finished. Who was working when the work finished?
What will come in place of 'A' in the given equation? \( \frac{A}{192} \) = \( \frac{48}{A} \)
Hari travels from City A to City B. If Hari drives his car at \( \frac{1}{8} \) of his normal speed, then he reaches City B 21 minutes late. Find the time (in minutes) that Hari would have taken to travel from City A to City B if he drove at his normal speed.
A refinery produces 3 grades of gasoline: Regular (85% octane), Mid-grade (90% octane), and Premium (95% octane). If 200 barrels of Regular, 100 barrels of Mid-grade,and 100 barrels of Premium are mixed, what is the average octane rating?