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Time and Distance Practice Test 1 with solutions
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© examsnet.com
Question : 21
Total: 40
In a flight of 600 km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200 km/hr and time of flight increased by 30 minutes. What is the duration of flight?
4 hours
3 hours
2 hours
1 hour
Validate
Solution:
👈: Video Solution
Let actual speed of the aircraft be x km/hr; then
600
x
−
200
−
600
x
=
1
2
⇒
x
2
- 200x - 24000 = 0
⇒ (x – 600) (x + 400) = 0
∴ x = 600 (Taking positive value only)
Hence, duration of flight =
600
600
= 1 hr.
© examsnet.com
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