Question
The time taken by a boat to
travel 'd' kilometers downstream is 8 hours, while the time taken to travel (d - 60) kilometers upstream is 10 hours. The speed of the current is equal to one-fifth of the boat's speed in downstream conditions. Determine the speed of the boat in still water.Solution
ATQ, Let the speed of the boat in still water be 'U' km/hr and the speed of the current be 'V' km/hr (U + V)/5 = V (U + V)/V = 5/1 U + V = 5p V = p U = 5p – p = 4p km/hr U – V = 4p – p = 3p km/hr 5p × 8 – 3p × 10 = 60 40p – 30p = 60 10p = 60 p = 6 km/hr Speed of the boat in still water = 4 × 6 = 24 km/hr
Three of the following words are alike in some manner and hence form a group. Which word does NOT belong to that group?
Which country is the largest milk producer in the world?
Which of the following has been reelected as the Environment’s Goodwill Ambassador for India?
Dr. B R Ambedkar was elected to the constitutional assembly from which one of the following states?
The National Emblem of India is an adaptation of the Lion Capital built by which emperor?
...Where is the Mudumalai Tiger Reserve located?
The Reserve Bank of India plans to implement a 5% run-off factor on digitally accessible retail deposits to manage what type of risk?
Garo, Khasi, Jaintiya hills are located in which hills ?Â
The famous Capitol Complex, the UNESCO World Heritage Site is located in which State/UT of India?
Which one of the following tribes is not the native of Andaman and Nicobar Islands?
Relevant for Exams:
