Michael finished colouring a picture in `7/(12)` hour. Vaibhav finished colouring the same picture in `3/4` hour. Who worked longer? By what fraction was it longer?

Rafiq exercised for 3/6 of an hour, while Rohit exercised for 3/4 of an hour. Who exercised for a longer time?

Sita can finish typing a 100 page document in 9 hours, Mita in 6 hours and Rita in 12 hours. How long will they take to type a 100 page document if they work together?

Ravish exercised for 3/6 an hour, while Rohit exercised for 3/4 of an hour Who exercised for a longer time ?

Alejandro, working alone, can build a doghouse in 4 hours. Betty can build the same doghouse in 3 hours. If Betty and Carmelo, working together, can build the doghouse twice as fast as Alejandro can alone, how long would it take Carmelo, working alone, to build the doghouse?

(1)/(x)+(3)/(x)=(1)/(2) Dennis is helping Billy assemble his new computer desk. Billy can put the desk together three times as fast as Dennis, and together Billy and Dennis can finish assembling the desk in 2 hours. The equation above represents this situation. Which of the following describes what the expression (3)/(x) represents in this equation?

There are 87 balls in a jar. Each ball is painted with at least one of two colours, red or green. It is ovserved that 2/7 of the balls that have red color also have green color, while 3/7 of the balls that have green color also have red color. What fraction of the balls in the jar have both both red and green colors?

Ten men, working for 6 days of 10 hours each, finish (5)/(21) of a piece of work. How many men working at the same rate and for the same number of hours each day, will be required to complete the remaining work in 8 days ?

6 men and 8 boys can do a piece of work in 7 days, while 8 men and 12 boys do the same work in 5 days. How long would it take one boy to finish the same work?

Ravish takes 2 1/5 minutes to walk across the school ground. Rahul takes 7/4 minutes to do the same. Who takes less time and by what fraction?