Multiple choice

A car can finish a certain distance in 8 hours at a speed of 45 km/hr. In order to cover the same distance in 6 hours, the speed of car in km/hr must be increased by- एक कार एक निश्चित दूरी को 45 कि.मी. की दर से 8 घण्टे में पूरी करती है। उसी दूरी की 6 घण्टें में तय करने के लिए कार की गति कि.मी./घण्टे में वृद्धि की आवश्कता है-

  1. 60 km /hr

  2. 20 km /hr

  3. 15 km /hr

  4. 50 km /hr
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Distance = 45 × 8 = 360 km. To cover 360 km in 6 hours, speed needed = 360 ÷ 6 = 60 km/hr. Increase needed = 60 - 45 = 15 km/hr. Distance remains constant, so speed and time are inversely proportional.

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