Speed , time and distance practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
Two cars, X and Y, start from points 360 km apart and travel at constant speeds. If they move towards each other, they meet in 4 hours. If they move in the same direction, they meet in 12 hours. What is the speed of car X? Assume X is the faster car.
Correct Answerसही उत्तर
A. 60 km hA. 60 किमी घंटा
Explanationव्याख्या
When the cars move in opposite directions, their relative speed is:
h Therefore: X + Y = 90 When they move in the same direction, their relative speed is:
h Since X is faster: X − Y = 30 Adding the two equations:
h Hence, the correct answer is 60 km
h.
जब दोनों कारें एक-दूसरे की ओर चलती हैं, तो उनकी सापेक्ष गति: = 360 ÷ 4 = 90 km
जब दोनों एक ही दिशा में चलती हैं, तो उनकी सापेक्ष गति: = 360 ÷ 12 = 30 km
दोनों समीकरणों को जोड़ने पर: 2X = 120 X = 60 km
अतः सही उत्तर 60 किमी
घंटा है।
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