Multiple choice

Manoj takes 30 seconds to cover a distance of 270 m on increasing his speed by 60%. If he travels at his original speed, how much time will he take to cover the same distance?

  1. 45 seconds

  2. 48 seconds

  3. 40 seconds

  4. 20 seconds

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Present speed of Manoj = 270/30 = 9 m/s Let his initial speed be x m/s. His increased speed: 1.6 x = 9/1.6 = 45/8 m/s So, time taken = 270/(45/8) = 48 sec

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