alleryஒரு சிறுவன் 5 km/h வேகத்தில் நடந்தால் 6 நிமிடங்கள் தாமதமாகவும், ஆனால் 6 km/h வேகத்தில் நடந்தால் 6 நிமிடங்கள் முன்னதாகவும் சென்றடைகிறான். அவனது சேருமிடம் எவ்வளவு தூரத்தில் உள்ளது?
A4 km
B6 km
C8 km
D5 km
Answer & Solution
Correct answer: B. 6 km
d/5 - d/6 = 12 min = 0.2 h என்பது d/30 = 0.2 எனத் தருகிறது, எனவே d = 6 km.
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