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രാമു ഒരു ജോലി 6 ദിവസം കൊണ്ടും രാജു അതേ ജോലി 18 ദിവസം കൊണ്ടും ചെയ്യും. രണ്ടുപേരുംചേർന്നു ജോലി ചെയ്താൽ മുഴുമിക്കാൻ എത്ര ദിവസം വേണം?

A4

B5

C4.5

D5.5

Answer:

C. 4.5

Read Explanation:

ആകെ ജോലി= LCM (6, 18) = 18 രാമുവിൻ്റെ കാര്യക്ഷമത = 18/6 = 3 രാജുവിൻ്റെ കാര്യക്ഷമത = 18/18 = 1 രണ്ടുപേരും ചേർന്ന് ജോലി ചെയ്യാൻ എടുക്കുന്ന സമയം = 18/(3 + 1) = 18/4 = 4.5


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