সব প্রশ্নে ফিরে যান
Math
In one hour, a boat goes 11 km/hr along the stream and 5 km/ hr against the stream. What is the speed of the boat in still water?
A) 5 km/hr
B) 8 km/hr
সঠিক উত্তর
C) 9 km/hr
D) 10 km/hr