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Let the speed of the boat be u and that of the stream be v. Then, speed of boat downstream = u + v And speed of boat upstream = u – v From I u + v = 18/3 = 6 km/hr ……….. (i) From II, u – v = 18/6 = 3 km/hr ……… (ii) From statement III, v = u/3 ……….(iii) From I and II, we get u = 9/2 = 4.5 km/hr. From I and III, we get u + u/3 = 6 Or 4u = 18 u = 4.5 km/hr. Hence statement I and either II or III is sufficient to answer the question.
The major maize producing districts in Rajasthan are -
Which earthquake measuring scale is based on Earth's rigidity and the amount and area of slip on the fault?
Which of the following is not correctly matched?
Norman Borlaug was given Nobel Prize in which field?
Which of the following pairs of State and formation year is/are correct?
I. Nagaland - 1972
II. Uttarakhand - 2000
III. Arunachal Pradesh - 1987
A. his subjects wisely
B. was a very kind and generous
C. king who looked after
D. everyone said that he
Where has the Constitution Park been inaugurated in Rajasthan by President Draupadi Murmu?
Which blood cells are called 'Soldiers' of the body?
What is the range of the intensity scale used in measuring earthquakes?