সব প্রশ্নে ফিরে যান
Math
A man rows at 6 km/hr in still water and 4.5km/hr against current. His rate along the current is :
A) 9.5 km/hr
B) 7.5 km/hr
সঠিক উত্তর
C) 7 km/hr
D) 5.25 km/hr