A man walks at a rate of 10mph.After every ten miles, he rest for 6minutes. How much time does he take to walk 50miles?

A 300
B 318
C 322
D 324

Correct Answer: 324

ব্যাখাঃ ১০ মাইল হাটে ১ ঘন্টায় ৫০ মাইল হাটে ৫০/১০ ঘন্টায় = ৫ ঘন্টায় = ( ৫×৬০) সেকেন্ড = ৩০০ সেকেন্ড লোকটি ৫০ মাইল হাটতে প্রতি ১০ মাইল অন্তর ৪ বার বিশ্রাম নিতে হয়। সুতরাং, লোকটির মোট সময় লাগে = ৩০০ + ৬×৪ = ৩২৪ সেকেন্ড
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