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:
160 comments Page 10 of 16.
Dhanshri said:
1 decade ago
s = d/t.
s1 = d1/t1.
s2 = d2/t2.
s1t1 = s2t2/distance is same.
t2 = s1t1/s2.
t2 = 240*5/(5/3).
t2 = 720.
s1 = d1/t1.
s2 = d2/t2.
s1t1 = s2t2/distance is same.
t2 = s1t1/s2.
t2 = 240*5/(5/3).
t2 = 720.
Bhupesh shahare said:
1 decade ago
Still it confusing, how 5/3 comes?
Sai said:
1 decade ago
1200/5/3
= 1200*3/5 = 3600/5 = ?
= 1200*3/5 = 3600/5 = ?
Manoj said:
1 decade ago
Why distance is 3?
Gloria said:
1 decade ago
Please more explanation on 5/3?
Penny said:
1 decade ago
Either the options are incorrect or there is something seriously wrong with my basics.
How could 1 hour be written as 5/3?:-o.
How could 1 hour be written as 5/3?:-o.
Nama said:
1 decade ago
= (1+2/3).
= (3+2/3).
= (5/3).
= (3+2/3).
= (5/3).
Deepak roy said:
1 decade ago
Why you taken 1+2/3?
Chitaranjan bhoi said:
1 decade ago
If it cover 1200 km in one hour then its speed is 1200 km/hr. How it is 720 km/hr?
Suchi said:
1 decade ago
Why this is wrong?
Speed = 240 km/hr.
Time = 5 hrs.
Distance = 240*5 = 1200 km.
Which means for 1 hr its 240 km. So for 5/3 hr it is 5/3 *240 = 400 km.
Speed = 240 km/hr.
Time = 5 hrs.
Distance = 240*5 = 1200 km.
Which means for 1 hr its 240 km. So for 5/3 hr it is 5/3 *240 = 400 km.
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