Subject
Quantitative Aptitude
Topic
Speed & Distance
A salesman travels a distance of 50 km in 2 hours and 30 minutes. How much faster, in kilometers per hour, on an average, must he travel to make such a trip in (5/6) hours less time?(একজন বিক্রয়কর্মী 2 ঘন্টা 30 মিনিটে 50 কিলোমিটার দূরত্ব অতিক্রম করে । ঘন্টায় কত গতি হলে ঐ দূরত্ব (5/6) ঘন্টা কম সময়ে অতিক্রম করতে পারবে?)
A salesman travels a distance of 50 km in 2 hours and 30 minutes. How much faster, in kilometers per hour, on an average, must he travel to make such a trip in (5/6) hours less time?(একজন বিক্রয়কর্মী 2 ঘন্টা 30 মিনিটে 50 কিলোমিটার দূরত্ব অতিক্রম করে । ঘন্টায় কত গতি হলে ঐ দূরত্ব (5/6) ঘন্টা কম সময়ে অতিক্রম করতে পারবে?)
ক)
10খ)
20গ)
30ঘ)
None of theseExplanation
বিক্রয়কর্মীর গতিবেগ = (50/2.5) = 20 km/hr (5/6) ঘন্টা বা 50 মিনিট কম সময়ে যেতে হলে তাঁকে 50 km দূরত্ব অতিক্রম করতে হবে = ( 2 ঘন্টা 30 মিনিট - 50 মিনিটে) = 1 ঘন্টা 40 মিনিট = 1 (40/60) ঘন্টা = 1 (2/3) এক্ষেত্রে, বিক্রয়কর্মীর গতি হবে ঘন্টায় = [50/{1 (2/3) }] km = 50×(3/5) km = 30 km প্রতি ঘন্টায় গতি বাড়াতে হবে = 30-20 = 10 kmRelated questions
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