Mamun is faster than Jahid. Mamun and Jahid each walk 24 km. The sum of their speeds is 7 km/hr and the sum of time taken by them is 14 hours. Then Mamun's speed is equal to:

• ক 4 km/hr. ✅ সঠিক উত্তর
• খ 2 km/hr.
• গ 6 km/hr.
• ঘ 5 km/hr.