A boat can row $40 \text{ km}$ downstream in $4 \text{ hours}$ and $20 \text{ km}$ upstream in $5 \text{ hours}$. What is the speed of the current?

Options:

• A: $2 \text{ km/h}$
• B: $2.5 \text{ km/h}$
• C: $3 \text{ km/h}$
• D: $4 \text{ km/h}$

Related Practice Questions:

• Which of the following artifacts, extensively found at Burzahom and Gufkral, specifically indicates that the Neolithic inhabitants of Kashmir practiced sewing animal skins for clothing to survive the harsh winters?
• The earliest known evidence of rock art in India, in the form of 'Cupules' (hemispherical cup-shaped depressions carved into rock), belongs to the Lower Paleolithic age and was found at:
• The first human colonization of the fertile Ganga plains, as evidenced by archaeological discoveries at Sarai Nahar Rai and Mahadaha, took place during which period?
• Which prehistoric site located in the Thar Desert of Rajasthan provides a continuous and undisturbed profile of Lower, Middle, and Upper Paleolithic cultures?