alleryഒരു കാറിന്റെ വേഗത മണിക്കൂറിൽ 5 കിലോമീറ്റർ വർദ്ധിപ്പിച്ചാൽ ഒരു 60 കിലോമീറ്റർ റൂട്ട് 1 മണിക്കൂർ നേരത്തെ പൂർത്തിയാക്കാൻ കഴിയും. അതിന്റെ യഥാർത്ഥ വേഗത എത്രയായിരുന്നു?
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 s(s+5) = 300 നൽകുന്നു, അതിനാൽ s = 15 km/h.
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