Please enter the following details
Free Daily Targets & Mocks
Study Material & Formulas PDFs
1 on 1 Mentorship
Question 9
Swati can row a boat on still water at a speed of 5 km/hr. However, on a given river, it takes her 1 hour more to row the boat 12 km upstream than downstream. One day, Swati rows the boat on this river from X to Y, which is N km upstream from X. Then she rows back to X immediately. If she takes at least 2 hours to complete this round trip, what is the minimum possible value of N?
Solution
Let the speed of the stream be x
$$\frac{12}{5-x}=\frac{12}{5+x}+1$$
The value of x satisfying the above equation is 1
Now,
$$\frac{N}{5+1}+\frac{N}{5-1}\ge2$$
$$\frac{2N+3N}{12}\ge2$$
=> $$N\ge4.8$$
Video Solution
Create a FREE account and get:
- All Quant Formulas and shortcuts PDF
- 15 XAT previous papers with solutions PDF
- XAT Trial Classes for FREE
XAT Quant Questions | XAT Quantitative Ability
XAT Profit, Loss and Interest QuestionsXAT Linear Equations QuestionsXAT Time, Distance and Work QuestionsXAT Geometry QuestionsXAT Functions, Graphs and Statistics Questions
XAT DILR Questions | LRDI Questions For XAT
XAT Puzzles QuestionsXAT Quant Based DI QuestionsXAT Logical Reasoning QuestionsXAT Data Interpretation QuestionsXAT Table with Missing values Questions
