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ഒരാൾ P-യിൽ നിന്നും Q-യിലേക്ക് ശരാശരി 60 km/hr വേഗതയിൽ കാറിൽ സഞ്ചരിക്കുന്നു. ശരാശരി 90 km/hr വേഗതയിൽ P-യിലേക്ക് മടങ്ങുന്നു. അയാളുടെ യാത്രയുടെ ശരാശരി വേഗം എത്ര ?

A62

B72

C36

Dഇവയൊന്നുമല്ല.

Answer:

B. 72

Read Explanation:

ശരാശരി വേഗത = 2 × S1 × S2/[S1+S2] S1 = 60 S2 = 90 ശരാശരി വേഗത = 2 × 60 × 90/[60 + 90] = [2 × 60 × 90]/150 = 72


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