If 30 workers can complete a specific construction project in 34 days, exactly how many days will it take for 255 workers to complete the exact same project (assuming all workers operate at the same rate)?

If 11 workers can complete a specific construction project in 23 days, exactly how many days will it take for 23 workers to complete the exact same project (assuming all workers operate at the same rate)?

In a class of 78 students, 19 study Physics, 64 study Chemistry, and 5 study neither. How many students study both Physics and Chemistry?

If Person A can complete a task alone in 20 days, and Person B can complete the same task alone in 30 days, how many days will it take them to complete the task if they work together?

If Person A can complete a task alone in 5 days, and Person B can complete the same task alone in 20 days, how many days will it take them to complete the task if they work together?

A sum of Rs. 5500 is strictly divided among three individuals A, B, and C in the ratio 3:4:4. What is the exact monetary share of person B?

In a certain code, if '+' means 'multiplied by', '-' means 'divided by', 'x' means 'minus', and '/' means 'plus', what is the value of the following mathematical expression: 20 - 2 + 4 / 12 x 7 ?