alleryঘণ্টাত 40 কিলোমিটাৰ বেগত এটা ভ্ৰমণ 1 ঘন্টা দেৰিকৈ শেষ হয়; 60 কিলোমিটাৰ প্ৰতি ঘণ্টাত, 1 ঘণ্টা আগতে। নিৰ্ধাৰিত সময়সীমা?
A6 ঘন্টা
B5 ঘন্টা
C3 ঘন্টা
D4 ঘন্টা
Answer & Solution
Correct answer: B. 5 ঘন্টা
দূৰত্ব d ৰ বাবে d/40 − d/60 = 2 য়ে d = 240 কিলোমিটাৰ দিয়ে, গতিকে নিৰ্ধাৰিত সময়সীমা 240 ÷ 40 − 1 = 5 ঘণ্টা।
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