allery40 km/h এ একটি ট্রিপ শেষ হয় 1 h দেরিতে; 60 km/h, 1 h তাড়াতাড়ি নির্ধারিত সময়কাল?
A6 ঘন্টা
B5 ঘন্টা
C3 ঘন্টা
D4 ঘন্টা
Answer & Solution
Correct answer: B. 5 ঘন্টা
দূরত্বের জন্য d, d/40 − d/60 = 2 দেয় d = 240 কিমি, তাই নির্ধারিত সময়কাল হল 240 ÷ 40 − 1 = 5 ঘন্টা।
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