Let the man's speed is 'x' and that of stream flow is 'y'. Then, x + y = 10 ----- (i) => x - y = 5 ------ (ii) Solving (i) and (ii) we get, => x = 7.5 km/hr
The total age of 'R' and 'D' eight years ago was thirty-six. Four years separate 'R' and 'D' in age. Determine the total age difference (in years) betwe...
A is thrice as efficient as B and can finish a piece of work in 28 days less than B. B can finish this work in how many days?
P and Q can complete a project in 15 days and 10 days, respectively. They started doing the work together, but after 2 days, Q had to leave and P alone...
Three bells ring at interval of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a particular time. They will ring tog...
A can do 50% of the job in 16 days, B can do 1/4th of the job in 24 days. In how many days can they do 3/4th of the job working together?
A and B can finish a work working on alternate days in 19 days, when A works on the 1st day. Similarly, they can finish the work working on alternate da...
Pipes A and B can fill an empty tank in 6 and 8 hours respectively, while pipe C can empty the full tank in 10 hours. If all three pipes are opened toge...
Three pipes, A, B, C can fill an empty cistern in 2, 3 and 6 hours respectively. They are opened together. After what time should B be closed, so that ...
A, B and C can do a job working alone in 50, 75 and 20 days respectively. They all work together for 4 days, then C quits. How many days will A and B ta...
A and B can complete a piece of work in 120 days, B and C can complete it in 150 days, and A and C can complete it in 200 days. In how many days can B ...
