A man walks at a speed of 2 km/hr and runs at a speed of 6 km/hr. How much time will the man require to cover a distance of 20 1/2 km, if he completes half of the distance, i.e., (10 1/4) km on foot and the other half by running ?

Question

নিচের অপশন গুলা দেখুন

• 9.9 hrs
• 11.9 hrs
• 10.7 hrs
• 12.4 hrs

Answer 1

সঠিক উত্তর হচ্ছে: 11.9 hrs

ব্যাখ্যা:

We know that

Time = Distance/speed
Required time = (10 1/4)/2 + (10 1/4)/6
= 41/8 + 41/6
= 287/24 = 11.9 hours.