A bus travelling at 11 km/h completes a journey in 14 hours. At what speed will it have to cover the same distance in 11 hours?
A18 km/h
B23 km/h
C14 km/h
D4 km/h
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The speed of a boat in still water is 15 km/hr. It can go 30 km upstream and return down stream to the original point in 4 hrs and 30 minutes. Find the speed of the stream:
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
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