A car covers the first 39 km of its journey in 45 minutes and covers the remaining 25 km in 35 minutes. What is the average speed of the car?
Solution
Correct Answer: Option B
মোট অতিক্রান্ত দূরত্ব = (39+25) = 64 km
মোট অতিবাহিত সময় =(45+35) = 80 মিনিট = (80/60) hrs = (4/3) hrs
∴ গড় গতি = (মোট দূরত্ব/মোট সময়) = {64/(4/3)} = {64×(3/4)} = 48 km/hr
মোট অতিবাহিত সময় =(45+35) = 80 মিনিট = (80/60) hrs = (4/3) hrs
∴ গড় গতি = (মোট দূরত্ব/মোট সময়) = {64/(4/3)} = {64×(3/4)} = 48 km/hr
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