Q1: If Ria types 30 pages in 45 minutes, how many pages can she type in 3 hours? (with same speed)
Q2: It takes 3 men 5 days to assemble 30 cars. How long will it take 2 men to assemble 6 cars?
Q3: Mr. Imran can do a job in 5 days, while Mr. Ali needs 10 days to finish the same job. How long will it take if they work together?
Q4: In a class, the ratio of boys to girls is 5:4. If the total number of students in the class is 81, what is the number of girls in the class?