allery40 km/h پر ایک سفر 1 h دیر سے ختم ہوتا ہے۔ 60 km/h، 1 h جلد۔ طے شدہ دورانیہ؟
A6 گھنٹے
B5 گھنٹے
C3 گھنٹے
D4 گھنٹے
Answer & Solution
Correct answer: B. 5 گھنٹے
فاصلہ d کے لیے، d/40 − d/60 = 2 d = 240 کلومیٹر دیتا ہے، لہذا طے شدہ دورانیہ 240 ÷ 40 − 1 = 5 گھنٹے ہے۔
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