Mathematics: Compare the box plots for two data sets. Which statement is true? Set A . Set B 20 22 24 26 28 30 32 34 36 38 40 The range for Set B is greater than the range for Set A. The ranges for both sets are equal. The medians for both sets are equal. The median for Set A is greater than the median for Set B.

Compare the box plots for two data sets. Which statement

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09.02.2022

He should row at the speed of 12 kilometers per hour.

Step-by-step explanation:

Given:

An athlete plans to row upstream a distance of 6 kilometers and then return to his starting point in a total time of 4 hours.

The rate of current is 2 km/hr.

Now, to find how fast should he row.

Let speed of the athlete row be .

Distance = 6 kilometres.

So, to get the time of upstream:

Rate of upstream = x-2. .

Time of upstream = $\frac{x-2}{6}$

Now, to get the time of downstream:

Rate of upstream= x+2

Time of downstream = $\frac{x+2}{6}$ .

Now, as given total time 4 hours.

Thus, we set an equation:

Time of upstream + time of downstream = total time.

$\frac{x-2}{6} +\frac{x+2}{6} =4.$

$\frac{x-2+x+2}{6} =4.$

$\frac{2x}{6} =4.$

Multiplying both sides by 6 we get:

2x =24.

Dividing both sides by 2 we get:

x =12.

Therefore, he should row at the speed of 12 kilometers per hour.

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