Subject
Quantitative Aptitude
Topic
Speed & Distance
A bus started its journey from Ramgarh and reached Devgarh in 44 minutes at its average speed km/hr. If the average speed of the bus is increased by 5 km/hr. How much time will it take to cover the same distance?
A bus started its journey from Ramgarh and reached Devgarh in 44 minutes at its average speed km/hr. If the average speed of the bus is increased by 5 km/hr. How much time will it take to cover the same distance?
ক)
31 minখ)
36 minগ)
38 minঘ)
40 minExplanation
(প্রশ্ন- ( একটি বাস রামগড় থেকে 50 km/hr বেগে দেবগড়ে যেতে 44 মিনিট সময় লাগে । যদি বাসটির গতি প্রতি ঘন্টায় 5 km বৃদ্ধি পায় । তবে একই দূরত্ব অতিক্রম করতে কতক্ষণ সময় লাগবে?) বাসটি 1 ঘন্টায় বা 60 মিনিটে অতিক্রম করে 50 km ∴ 1 " " " = (50/60) " ∴ 44 " " " ={(50×44)/60} " = 110/3 km রামগড় ও দেবগড়ের দূরত্ব = (110/3) km গত 5 km/hr বৃদ্ধি করলে পরিবর্তিত গতি = (50+5) = 55 km/hr = (55/60) km/min ∴ সময় = (দূরত্ব/গতি) = {(110/3)/(55/60)} = {(110/3)×(60/55)} = 40 মিনিটRelated questions
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