If the sum of upstream and downstream speed is 26 km/hr
and the speed of the current is 5 km/hr. Then find time taken to cover 72 km in downward?
A2 hrsCorrect AnswerIncorrect Answer
B2.5 hrsCorrect AnswerIncorrect Answer
C3 hrsCorrect AnswerIncorrect Answer
D3.5 hrsCorrect AnswerIncorrect Answer
E4 hrsCorrect AnswerIncorrect Answer
Solution
Let the speed of boat in still water be x km/hr. According to the question, => x + 5 + x − 5 = 26 => x = 13 Downstream speed = 5 + 13 = 18 km/hr Required time = 72/18 = 4 hrs