Multiple choice

A car covers its journey at the speed 60 km/hr. in 15 hours. If the same distance is to be covered in 9 hours, by how much the speed of car will have to increase? एक कार 60 किमी / घंटा की गति से एक यात्रा को 15 घंटे में तय करती है। यदि समान दूरी को 9 घंटो में तय किया जाये तो गति कितनी बढ़ानी होगी ?

  1. 60 km./hr. 60 किमी / घंटा

  2. 50 km./hr. 50 किमी / घंटा

  3. 40 km./hr. 40 किमी / घंटा

  4. 30 km./hr. 30 किमी / घंटा

  5. 20 km./hr. 20 किमी / घंटा
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Distance = 60 × 15 = 900 km. New speed = 900/9 = 100 km/hr. Increase needed = 100 - 60 = 40 km/hr. Option A (60) incorrectly doubles the original speed instead of finding the difference.

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