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The following question has three statements. Study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. What is the speed of boat in still water? I. The boat can cover 25 km downstream distance in 5 hours. II. Speed of the stream is two-third of the speed of boat in still water. III. The boat can cover 25 km upstream distance in 10 hours.

The following question has three statements. Study the question and the statements and decide which of the statement(s) is/are necessary to answer the question. What is the speed of boat in still water? I. The boat can cover 25 km downstream distance in 5 hours. II. Speed of the stream is two-third of the speed of boat in still water. III. The boat can cover 25 km upstream distance in 10 hours. Correct Answer Any two statements together

Let speed of boat = u, and speed of stream = v

From Statement I:

u + v = 25/5 = 5 km/hr

From Statement II:

v = 2u/3

From Statement III:

u – v = 25/10 = 2.5

Here by solving any two equations we can get the value of ‘u’

∴ Any two statements will be necessary to answer the question

Related Questions

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