alleryA 6 ইউনিট/ঘণ্টা করে; B 4 ইউনিট/ঘণ্টা করে এবং 2 ঘন্টা পরে শুরু হয়। A এর শুরু থেকে 92টি ইউনিট কখন সম্পন্ন হয়?
A10 h
B9 h
C11 h
D12 h
Answer & Solution
Correct answer: A. 10 h
A যদি t ঘন্টা কাজ করে, 6t + 4(t − 2) = 92 দেয় t = 10 ঘন্টা।
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