P and Q can do a work individually in 15 days and 20 days respectively. Find the respective ratio of their efficiencies.
A4 : 3
B3 : 4
C4 : 5
D5 : 4
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
Two pipes A and B can fill a tank in 15 hours and 20 hours, respectively, while a third pipe C can empty the full tank in 30 hours. If all the three pipes operate simultaneously, in how much time will the tank, initially empty, be filled?
A job is completed by 10 men in 20 days and by 20 women in 15 days. How many days will it take for 5 men and 10 women to finish that work ?
If P and Q together can do a job in 15 days, Q and R together can do it in 12 days and P and R together can do the same in 20 days, then in how many days will the job be completed, if all the three work together?
A and B can do a piece of work in 10 days and 15 days, respectively. They work together for 4 days. The remaining work is completed by C alone in 12 days. C alone will complete 4/9 part of the original work in:
ഒരു കമ്പ്യൂട്ടർ ലാബിൽ 6 കൂട്ടികൾക്ക് 3 കമ്പ്യൂട്ടർ ഉണ്ട്. 24 കൂട്ടികൾക്ക് എത്ര കമ്പ്യൂട്ടർ ഉണ്ടാവും?