সব প্রশ্নে ফিরে যান
Math
A man's speed with the current of a river is 15 km/hr and the speed of the current is 2.5 km/hr. What is the man's speed against the current?
A) 8.5 km/hr
B) 9 km/hr
C) 10 km/hr
সঠিক উত্তর
D) 12.5 km/hr