alleryکار کی رفتار کو 5 کلومیٹر فی گھنٹہ بڑھانے سے یہ 60 کلومیٹر کا راستہ 1 گھنٹہ جلد مکمل کر سکتا ہے۔ اس کی اصل رفتار کیا تھی؟
A12 km/h
B15 km/h
C10 km/h
D20 km/h
Answer & Solution
Correct answer: B. 15 km/h
60/s - 60/(s+5) = 1 دیتا ہے s(s+5) = 300، لہذا s = 15 km/h۔
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