The speeds of three cars are in the ratio 5: 3: 4. The ratio between the time taken by these cars to cover the same distance is :
A12 : 20 : 15
B10 : 13 : 15
C16 : 13 : 15
D12 : 13 : 15
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ഒരാളുടെ യാത്രയിൽ ആദ്യത്തെ 160 കി.മീ. കാറിലും തുടർന്ന് 50 കി.മീ. ബസിലും യാത്ര ചെയ്തു. കാറിന്റെ വേഗത 50 കി.മീ. മണിക്കുർ, ബസിന്റെ വേഗത 50 കി.മീ. മണിക്കൂർ. ഈ യാത്രകളുടെ ശരാശരി വേഗത എത്ര ?
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