Ravikant cycles at a speed of 12.5 km/h and walks at a speed of 3 km/h. To cover a distance of 40 km by cycle and walk both, Ravikant took 7 hours. How many of these hours were spent cycling?
The ratio of the incomes of Barun and Anil is 12 : 13 and that of their expenditures is 10 : 13. Find the income of Barun and Anil, if they save โน2100 and โน1,300, respectively.
Working 5 h a day, A can complete a task in 8 days and working 6 h a day, B can complete the same task in 10 days. Working 8 h a day, they can jointly complete the task in:
A does half as much work as B in three-fourth of the time taken by B. If together they take 12 days to complete the work, how much time shall B take to do it alone?