Jamal covered a distance of 340 miles between ciry A and B taking a total of 5 hours. If part of the distance was covered at 60 miles per hours speed and the balance at 80 miles per hour speed, how many hours didhe travel at 60 miles per hour?

A 2
B 2.5
C 3
D None

Correct Answer: 3

মনেকরি, 60 মাইল বেগে x ঘণ্টা যায় .: 80 মাইল বেগে (5 - x) ঘণ্টা যায় প্রশ্নমতে, 60x + 80(5 - x) = 340 ⇒ 60x + 400 - 80x = 340 ⇒ - 20x = - 60 ⇒x = 3
Bissoy MCQ
#পিএসসি ও অন্যান্য নিয়োগ পরীক্ষা #গণিত #তিতাস গ্যাস ট্রান্সমিশন অ্যান্ড ডিস্ট্রিবিউসন কো. লি.-সহকারী ব্যবস্থাপক-08-10-2021 #distance & speed) #দূরত্ব ও গতিবেগ (Time #সময়

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