Aptitude - Time and Distance - Discussion
Discussion Forum : Time and Distance - General Questions (Q.No. 2)
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:
hours, it must travel at a speed of: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 14 of 17.
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.
Please tell me the solution.
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.
Spd = d/t.
t = 15.
Distance = d/t
= 240/15 = You will get the Answer.
Velu said:
9 years ago
Speed ---- time
240 ---- 5
x ---- 5/3...
In direct proposal.
240 * 5 * 3
----------------
5
= 740 km/hr.
240 ---- 5
x ---- 5/3...
In direct proposal.
240 * 5 * 3
----------------
5
= 740 km/hr.
Swarup said:
9 years ago
Actually, I can't understand that why we put distance=1200 km/hr and how?
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.
1.2/3 = 1.66.
240 km 5hrs.
Ans :-
5/1.66 = 3.0
So, 240 (3) = 720kmph.
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.
I want the explanation.
Ruchi said:
9 years ago
In the question, time is 1 2/3 hours, not one hour so we take it as 5/3 and get the answer as 720.
Dev said:
9 years ago
What is the formula of distance? Please tell me.
Sudha said:
9 years ago
Speed=distance÷time.
So, we substuite those values.
S = 1200/5/3.but why should change 5/3 as3/5.please tell me, I get confused.
So, we substuite those values.
S = 1200/5/3.but why should change 5/3 as3/5.please tell me, I get confused.
Satish said:
9 years ago
Why we do 5/3 and question is for 1 hour?
Why everyone doing fraction, it is just simply asked how much speed in 1 hour if some purpose is there for doing 5/3 then explain me.
Why everyone doing fraction, it is just simply asked how much speed in 1 hour if some purpose is there for doing 5/3 then explain me.
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