Multiple choice

A stealth jet can fly at 240 kmph in the stratosphere and at 200 kmph in the troposphere. Find its average speed if it is in the troposphere for three quarters of the distance.

  1. 208.6 kmph

  2. 220 kmph

  3. 228.5 kmph

  4. 210 kmph

  5. Can’t be determined

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Average speed = (Total Distance)/(Time Taken); D/(3D/(4*200) + D/(4*240)) = 208.6