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Aptitude - Time and Distance - Discussion

Discussion Forum : Time and Distance - General Questions (Q.No. 2)
Time and Distance
2.
An aeroplane covers a certain distance at a speed of 240 kmph in 5 hours. To cover the same distance in 1 hours, it must travel at a speed of:
300 kmph
360 kmph
600 kmph
720 kmph
Answer: Option
Explanation:

Distance = (240 x 5) = 1200 km.

Speed = Distance/Time

Speed = 1200/(5/3) km/hr.     [We can write 1 hours as 5/3 hours]

Required speed = 1200 x 3 km/hr = 720 km/hr.
5

Discussion:
163 comments Page 8 of 17.
Anisha said:   9 years ago
Aeroplane travels total of 1200km to cover same distance in 1 hour it should travel wit 1200 kmph right but how come 720 kmph?

I want the explanation.
Akhil Reddy said:   9 years ago
I can solve in this way without formulae.

1.2/3 = 1.66.
240 km 5hrs.
Ans :-
5/1.66 = 3.0
So, 240 (3) = 720kmph.
Swarup said:   9 years ago
Actually, I can't understand that why we put distance=1200 km/hr and how?
Velu said:   9 years ago
Speed ---- time
240 ---- 5
x ---- 5/3...

In direct proposal.
240 * 5 * 3
----------------
5
= 740 km/hr.
Jayalakshmi said:   10 years ago
Distance= s * t so 12 * 20 = 240,
Spd = d/t.
t = 15.
Distance = d/t
= 240/15 = You will get the Answer.
Bharath said:   10 years ago
If a boy walks at a speed of 12kmph, he takes 20 min to reach school. If he has to reach in 15 min, then with what speed he should walk?

Please tell me the solution.
Ross said:   10 years ago
Why does the 5/3 change to 3/5?
Gokul said:   10 years ago
How 5/3 changed into 3/5? Please tell.
Minerve baruah said:   10 years ago
A car moves a distance of 450 km in 8 hours find its speed?

Solve and explain the answer.
Vishal said:   10 years ago
Nice explanation thanks @Avinash.
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