Subject
Quantitative Aptitude
Topic
Speed & Distance
A motorist travels x miles in y hours and z minutes. What is his average speed in miles per hour?
A motorist travels x miles in y hours and z minutes. What is his average speed in miles per hour?
ক)
x/(y+60z)খ)
(60y+z)/xগ)
60x/(y+z)ঘ)
60x/(60y+z)ঙ)
none of theseExplanation
QUESTION : একজন motorist x miles দূরত্ব অতিক্রম করে y ঘণ্টা এবং z মিনিটে। তার average speed কত miles per hour? -motorist যে দূরত্ব অতিক্রম করেছে তা x miles। -সে যে সময় নিয়েছে তা y ঘণ্টা এবং z মিনিট। এই সময়কে ঘণ্টায় রূপান্তর করতে হবে। -Average speed বের করার formula হল: মোট দূরত্ব ভাগ মোট সময়। -এখানে, মোট সময়কে ঘণ্টায় রূপান্তর করতে হবে: y + (z/60) ঘণ্টা -তাই, average speed = x / (y + z/60) miles per hour -এটিকে সরল করলে পাই: 60x / (60y + z) miles per hour -সুতরাং, motorist-এর average speed হবে 60x / (60y + z) miles per hour, যা option (D)-তে দেওয়া আছে। *মোট দূরত্ব = x miles *মোট সময় = y ঘণ্টা + z মিনিট - y + (z/60) ঘণ্টা (কারণ 1 ঘণ্টা = 60 মিনিট) *গড় গতি = মোট দূরত্ব / মোট সময় - x / (y + z/60) - 60x / (60y + z) miles per hour -সুতরাং, সঠিক উত্তর হল (D) 60x/(60y+z)Related questions
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