# 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:

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:

145 comments Page 1 of 15.
Dayakar jitti said:
6 days ago

The given distance is =1200km.

speed =distance/time.

To cover the same is distance in 1^2/3 hours

which means we can write 1 power 2/3 as 1+2/3 therefore convert into fractions as,

1^2/3 = 1 + 2/3 = 3 * 1 + 2/3 which is 5/3 right so

according to the given problem we have to calculate the required speed.

Then speed =(1200 x 3/5)km/hr = 720 km/hr.

speed =distance/time.

To cover the same is distance in 1^2/3 hours

which means we can write 1 power 2/3 as 1+2/3 therefore convert into fractions as,

1^2/3 = 1 + 2/3 = 3 * 1 + 2/3 which is 5/3 right so

according to the given problem we have to calculate the required speed.

Then speed =(1200 x 3/5)km/hr = 720 km/hr.

Ssewajje Debbie said:
3 weeks ago

But how does 5/3 turn to 3/5? Please explain.

(1)

Shakti said:
4 months ago

How We can write 1 2/3hours as 5/3 hours?

Please explain.

Please explain.

(19)

Buvaneswaran V said:
4 months ago

Give:

S1 = 240kmph.

T1 = 5 hours.

T2 = 1 1/2 hours = 5/3 hours.

D1=D2.

To Find:

S2 = ?

Solution:

D = S x T.

D1 = D2.

So, S1 x T1 = S2 x T2.

240 x 5 = S2 x 5/3.

S2 = (240 x 5 x 3 )/5.

S1 = 240kmph.

T1 = 5 hours.

T2 = 1 1/2 hours = 5/3 hours.

D1=D2.

To Find:

S2 = ?

Solution:

D = S x T.

D1 = D2.

So, S1 x T1 = S2 x T2.

240 x 5 = S2 x 5/3.

S2 = (240 x 5 x 3 )/5.

(16)

Jeswin said:
5 months ago

Please Explain how and why the reciprocal became 5/3 to 3/5. Someone, could you explain it?

(9)

Rojob said:
7 months ago

Distance are same. So, we can write;

D1 = D2.

S1*T1 = S2*T2.

240*5 = S2*5/3,

S2 = 240*3,

S2 = 720kmph.

D1 = D2.

S1*T1 = S2*T2.

240*5 = S2*5/3,

S2 = 240*3,

S2 = 720kmph.

(37)

Chandra sekhar said:
7 months ago

How 1200/5/3 became 1200/3/5? Please Explain me.

(10)

Prashanth said:
7 months ago

1(2/3) is a mixed fraction.

= 1*2/3.

= Now we have to multiply denominator to 1 (1*3)

=3 + 2/3 = 5/3.

= 1*2/3.

= Now we have to multiply denominator to 1 (1*3)

=3 + 2/3 = 5/3.

(17)

Vaishnavi Kasana said:
8 months ago

In question it's given in mixed fraction, therefore it will be converted into fraction i.e 5/3 hrs.

(3*1)+2=5.

Fraction = 5/3hrs.

(3*1)+2=5.

Fraction = 5/3hrs.

(7)

Anisha said:
9 months ago

How does 2/3 become 3/5? Please explain to me.

(10)

Post your comments here:

Quick links

Quantitative Aptitude

Verbal (English)

Reasoning

Programming

Interview

Placement Papers