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The following question has three statements. Study the question and the statements and decide which of the statement(s) is necessary to answer the question. Find the speed of the stream. I) The boat can travel 45 km downstream in 5/2 hours. II) The boat can travel 45 km upstream in 15/4 hours. III) The boat can travel 45 km in still water in 3 hours.

The following question has three statements. Study the question and the statements and decide which of the statement(s) is necessary to answer the question. Find the speed of the stream. I) The boat can travel 45 km downstream in 5/2 hours. II) The boat can travel 45 km upstream in 15/4 hours. III) The boat can travel 45 km in still water in 3 hours. Correct Answer Any two

Considering statement I,

Downstream speed = 45/2.5 = 18 km/hr.

Considering statement II,

Upstream speed = 45/3.75 = 12 km/hr.

Considering statement III,

Speed in still water = 45/3 = 15 km/hr.

Considering statements I and II,

Speed of stream = (Downstream speed - Upstream speed)/2 = (18 - 12)/2 = 3 km/hr.

Considering statements I and III,

Speed of stream = Downstream speed - speed in still water = 18 - 15 = 3 km/hr.

Considering statements II and III,

Speed of stream = Speed in still water - upstream speed = 15 - 12 = 3 km/hr.

∴ The question can be answered using any two of the given statements

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