Solve the following mathematical problems.

Mr, Sakil leaves his office at a certain fixed time. If he walks at the rate 5 km per hour ( kmh) he is late by 7 minutes . If he walks at the rate 6 kmh, he reached office 5 minutes earlier.

Created: 4 months ago | Updated: 5 days ago
Job Solution Bangladesh Krishi Bank Bangladesh Krishi Bank Ltd. Recruitment Test For Senior Officer -2017 Examination Held On: 20.01.2017 || 2017 গণিত
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প্রশ্নে বলা হচ্ছে যে, Mr. Sakil প্রতিদিন একটি নির্দিষ্ট সময়ে অফিসের উদ্দেশ্যে বাসা থেকে বের হন। তিনি যদি ঘণ্টায় 5 কিলোমিটার বেগে হাঁটেন, তবে তাঁর 7 মিনিট দেরি হয়। অন্যদিকে ঘণ্টায় 6 কিলোমিটার বেগে হাঁটলে তিনি 5 মিনিট আগেই অফিসে পৌঁছেন। আপনাকে অফিস থেকে বাসার দূরত্ব বের করতে হবে। 

 

Let. distance of office from the house be x km.

According to question,

x5-760=x6+560 [Minutes is converted by hour]

⇒x5-x6=560+760⇒6x-5x30=5+760⇒x30=15⇒x=305∴ x=6 km 

4 months ago
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