Subject
Quantitative Aptitude
Topic
Speed & Distance
A person has to cover a distance of 6 km in 45 minutes. If he covers one-half of the distance in two-thirds of the total time; to cover the remaining distance in the remaining time his speed(in km/hr) must be ( একজন ব্যক্তিকে 45 মিনিট 6 km দূরত্ব অতিক্রম করতে হবে । সে মোট সময়ের দুই-তৃতীয়াংশ সময়ে অর্ধেক দূরত্ব অতিক্রম করলে, বাকি সময়ে অবশিষ্ট দূরত্ব তাঁকে কত বেগে অতিক্রম করতে হবে ?)
A person has to cover a distance of 6 km in 45 minutes. If he covers one-half of the distance in two-thirds of the total time; to cover the remaining distance in the remaining time his speed(in km/hr) must be ( একজন ব্যক্তিকে 45 মিনিট 6 km দূরত্ব অতিক্রম করতে হবে । সে মোট সময়ের দুই-তৃতীয়াংশ সময়ে অর্ধেক দূরত্ব অতিক্রম করলে, বাকি সময়ে অবশিষ্ট দূরত্ব তাঁকে কত বেগে অতিক্রম করতে হবে ?)
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6খ)
8গ)
12ঘ)
15Explanation
মোট সময় = 45 মিনিট মোট সময়ের (2/3) অংশ = 45×(2/3) মিনিট = 30 মিনিট ∴ বাকি সময় = ( 45-30 ) = 15 মিনিট = (15/60) ঘন্টা = 1/4 ঘন্টা মোট দূরত্ব = 6 km অর্ধেক দূরত্ব = (1/2)×6 = 3 km ∴(1/4) ঘন্টায় যেতে হবে 3 km ∴ 1 " " " = (4×3) km = 12 km ∴অবশিষ্ট দূরত্ব তাঁকে 12 km/hr বেগে যেতে হবে ।Related questions
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