Question
Download Solution PDFA lady row a distance of 15/4 km upstream in 3/2 hours and a distance of 13 km distance downstream in 2 hours. How much time will the lady take to row a distance of 90km in still water?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Upstream:
distance = 15/4 km
time = 3/2 h
Downstream:
distance = 13 km
time = 2 h
Formula used:
Speed = Distance/Time
U = Upstream speed
D = Downstream speed
Calculation:
⇒ U = (15/4)/(3/2)
⇒ U = 2.5 km/h
⇒ D = 13/2
⇒ D = 6.5 km/h
Speed in still water = (U + D)/2
⇒ (2.5 + 6.5)/2
⇒ 9/2
⇒ 4.5 km/h
⇒ T = D/S
⇒ 90/4.5
⇒ 20 hrs
∴ The answer is 20 hrs.
Last updated on Jul 8, 2025
-> The Staff Selection Commission released the SSC GD 2025 Answer Key on 26th June 2025 on the official website.
-> The SSC GD Notification 2026 will be released in October 2025 and the exam will be scheduled in the month of January and February 2026.
-> Now the total number of vacancy is 53,690. Previously, SSC GD 2025 Notification was released for 39481 Vacancies.
-> The selection process includes CBT, PET/PST, Medical Examination, and Document Verification.
-> The candidates who will be appearing for the 2026 cycle in the exam must attempt the SSC GD Constable Previous Year Papers. Also, attempt SSC GD Constable Mock Tests.