A Girl Wishes to Swim Across a River to a Point

question 48

Multiple Choice

A girl wishes to swim across a river to a point directly opposite as shown. She can swim at 2 m/s in still water and the river is flowing at 1 m/s. At what angle $\theta$ with respect to the line joining the starting and finishing points should she swim?

• A) 30 \(\degree\)
• B) 45 \(\degree\)
• C) 60 \(\degree\)
• D) 63 \(\degree\)
• E) 90 \(\degree\)

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Definitions:

Inferior Phrenic Vein

Veins that drain blood from the diaphragm into the inferior vena cava or the left suprarenal vein.

Axillary Vein

A vein that accompanies the axillary artery and drains the upper limb and the lateral aspect of the thorax and breast.

Subscapular Vein

A vein that drains blood from the subscapular region, which includes the underside of the scapula, and typically joins with the axillary vein.

Internal Thoracic Vein

A vein that runs alongside the internal thoracic artery and drains blood from the chest wall and breasts into the brachiocephalic vein.