Question
A boat running downstream covers a distance of 50 km in
2(1/2) hrs and the same distance upstream in 10 hrs. What is the speed of the boat in still water?Solution
Let the speed of boat in still water be x km/hr Speed of the stream = y km/hr Now, speed downstream (u) = (x + y) km/hr, and Speed upstream (v) = (x - y) km/hr According to question, Speed downstream = distance/time (x + y) = (50 × 2)/5 (x + y) = 20……………(i) Speed upstream = distance/time (x - y) = 50/10 (x - y) = 5…………………..(ii) Now, speed of boat in still water = (u + v)/2 km/hr ∴ Speed of boat in still water = (20 + 5)/2 km/hr = 25/2 km/hr = 12.5 km/hr
Which financial services company has launched electronic bank guarantee services for its MSMEs and corporate clients in association with National E-Gove...
Who was conferred with the 19th ‘Kalakar Puraskar’ for achievements in Konkani music, dance, theatre, folklore, and cinema?
Who has recently been appointed as the acting Governor of Mizoram?
The Reserve Bank of India (RBI) has officially added ________ to the Second Schedule of the RBI Act, 1934 so as to bolster its presence and strengthen i...
Why did the Indian government extend the tenure of the National Commission for Safai Karamcharis (NCSK) until 2028?
Technotex 2023 to be held in _____?
Which movie won the Critics Choice Awards 2023 for Best Foreign Language Film?
In PM SVAnidhi scheme, V stands for?
Which partnership or initiative is mentioned as part of BioE3 implementation to foster state-level action?
What significant step did NTPC take to support the GREEN initiative?
Relevant for Exams:
