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:
162 comments Page 9 of 17.
Rosy said:
1 decade ago
Hi friends, here in question they given as time for 1 hr, but all you guys taking as 5/3, why?
Lokesh said:
5 years ago
Distance = 240 * 5=1200
1 +2 /3 = 5/3.
REQUIRED SPEED = (1200/5/3)
= (1200 * 3/5)
= 720KM/HR.
1 +2 /3 = 5/3.
REQUIRED SPEED = (1200/5/3)
= (1200 * 3/5)
= 720KM/HR.
(7)
Pooja said:
1 decade ago
Not satisfied, still confuse why we are taking 5/3 as time why not 1? Please explain it well?
Jeswin said:
2 years ago
Please Explain how and why the reciprocal became 5/3 to 3/5. Someone, could you explain it?
(14)
Minerve baruah said:
9 years ago
A car moves a distance of 450 km in 8 hours find its speed?
Solve and explain the answer.
Solve and explain the answer.
Honey said:
1 decade ago
Time decrease by 3times. 5/3=1*2/3.
Therefore speed increases by 3 times=3x240=720km/hr.
Therefore speed increases by 3 times=3x240=720km/hr.
R Ravi kiran said:
6 years ago
At first, they given plane covers 240km in 5hours.
Which means 48 km per hours right?
Which means 48 km per hours right?
Divyan said:
1 decade ago
Why we are multiplying 240*5?
Because they 5hrs right. So it has to be 5*3600 right.
Because they 5hrs right. So it has to be 5*3600 right.
Avigeh said:
7 years ago
Given that->d=240kmph*5h = 1200,
t=3+2/3=5/3.
s=d/t.
s=1200/(5/3)=1200*3/5=7200.
t=3+2/3=5/3.
s=d/t.
s=1200/(5/3)=1200*3/5=7200.
Lakhan said:
1 decade ago
I have not understood the step where you have taken 1200*3/5 instead of 1200*5/3 ?
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