Anyone become my good caring big sister please myself Aditya Sharma age 16 standard 11 arts

How many liters of 60% alcohol solution should be added to 40 liters of a 20% alcohol solution to make a 50% solution?

Which is a factor that might lead a person to make a career choice for the wrong reasons?

Acheetah ran 75 meters at a speed of 25 meters per second. how long was the cheetah running? 3 seconds 5 seconds 30 seconds 50 seconds