[" 8.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? "]

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

Michacl finished colouring a picture in frac{7}{12} hour. Vaibhav finished colouring the same picture in frac{3}{4} hour. Who worked longer? By what fraction was in longer?

Rafiq exercised for (2)/(3) hour, while Rohit exarcised for (3)/(4) hour. Who exercised for a longer time?

A,backslash B,backslash C and D completed colouring a picture in (3)/(4) hour,(7)/(12) hour,(5)/(8) hour and (6)/(7) hour respectively.Which of the following took the least time in colouring the picture? A (b) B( c) C( d ) D

A can finish a piece of work in 12 hours while B can finish it in 15 hours. How long will both take to finish it, working together?