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A person travels equal distances with speeds of 4 km/hr, 5 km/hr and 6 km/hr and takes a total time of 37 minutes. The total distance (in km) is

A4

B5

C3

D2

Answer:

C. 3

Read Explanation:

Let the equal distances he travels be 'd' Total time = 37 minutes = (37/60) hours d/4+d/5+d/6=37/60 37d = 37 ⇒ d = 1 km ⇒ Total distance = 3 × 1 = 3 km


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സമാന്തര ട്രാക്കുകളിൽ എതിർദിശയിൽ യഥാക്രമം 200 km/hr, 160 km/hr, വേഗതയിൽ 240 m, 180 m നീളമുള്ള രണ്ട് ട്രെയിനുകൾ ഓടുന്നു. അപ്പോൾ പരസ്പരം കടക്കാൻ എടുക്കുന്ന സമയം (സെക്കൻഡിൽ) ആണ്