Question
If a man rows at the rate of 17 kmph in still
water and his rate against the current is 7 kmph, then find the man’s speed with downstream.Solution
Rate in still water = 17 kmph Rate upstream = 7 kmph Rate of current = 17 – 7 = 10 kmph Rate downstream = 17 + 10 = 27 kmph
A 150 litres mixture contains only water and phenyl in the ratio 3:2, respectively. If 20 litres of this mixture is replaced with 65 litres of alcohol, ...
35 men can complete a piece of work in 40 days. ‘x’ men started the work and after 30 days 60 more men joined them so that whole work was finished i...
- Aman and Bhuvan can complete a work in 21 days together, while Bhuvan alone can do it in 35 days. If the ratio of efficiencies of Aman and Chintu is 2:3, f...
‘P’ can complete 80% of a task in 32 days and ‘Q’ can do 60% of the task in 54 days. If ‘P’, ‘Q’, and ‘R’ all work together, they ca...
A certain number of students can complete the assignment together in 12 days. All of them started the assignment together, but 20 students left the assi...
Raman and Shyam can finish a task in 9 days working together. Shyam can finish that task alone in 12 days. How much time will Raman alone take to finish...
'B' is 20% more efficient than 'A.' 'A' began working on a task alone and continued for 8 days, after which 'B' took over and completed the remaining wo...
'Alex,' 'Ben,' and 'Charlie' can individually complete a task in 40, 60, and 100 days, respectively. They decide to work together, but there's a unique ...
32 workers can complete a task in 18 days. They all started together, but after how many days should 12 workers quit so that the task gets completed in ...
P, Q & R can finish a work in 10 days, 15 days, and 20 days, respectively, working alone. P and Q work on the first day, P and R work on the second day,...
Relevant for Exams:
