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Bunuel
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 10 Sep 2019, 23:01
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D
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. On her way back, she flew at a speed of 4 Km/h, thus, the trip lasted 4 hours more. What is the distance between the trees? (In Km)

A. 12.
B. 24.
C. 36.
D. 48.
E. 52.
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D
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 10 Sep 2019, 23:23
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Time= distance/ speed
Let distance =d
d/6+d/4=4
d=9.6
Bunuel can you please check if the options are correct

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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 10 Sep 2019, 23:27
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itoyj
Time= distance/ speed
Let distance =d
d/6+d/4=4
d=9.6
Bunuel can you please check if the options are correct

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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 10 Sep 2019, 23:33
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Bunuel
itoyj
Time= distance/ speed
Let distance =d
d/6+d/4=4
d=9.6
Bunuel can you please check if the options are correct

Posted from my mobile device


Ohh I missed the word "more"
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 11 Sep 2019, 00:16
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If distance is d and the time taken in first case is t when bird flew at 6 Km/h

then from distance= speed*time
d=6*t (I)

In second case when bird flew at 4 Km/h time will be (t+4), but distance is same
=> d = 4*(t+4)
=>d = 4t+16 (II)

From (I) and (II)
6t = 4t + 16
=> t = 8

Putting the value of t in (I)

d = 48 Km.

Answer (D)
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 11 Sep 2019, 09:39
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. On her way back, she flew at a speed of 4 Km/h, thus, the trip lasted 4 hours more. What is the distance between the trees? (In Km)

A. 12.
B. 24.
C. 36.
D. 48.
E. 52.
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from given info
6x=4*(x+4)
x=8
so 6*8 ; 48 km
IMO D
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 11 Sep 2019, 11:20
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Bunuel
A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. On her way back, she flew at a speed of 4 Km/h, thus, the trip lasted 4 hours more. What is the distance between the trees? (In Km)

A. 12.
B. 24.
C. 36.
D. 48.
E. 52.
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\(\frac{d}{4}- \frac{d}{6} = 4\)

Or, \(\frac{3d - 2d}{12}= 4\)

Or, \(d = 48\) , Hence Answer must be (D)
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 12 Sep 2019, 19:37
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Bunuel
A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. On her way back, she flew at a speed of 4 Km/h, thus, the trip lasted 4 hours more. What is the distance between the trees? (In Km)

A. 12.
B. 24.
C. 36.
D. 48.
E. 52.
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We can create the equation:

6T = 4(T + 4)

6T = 4T + 16

2T = 16

T = 8

The distance is 6 x 8 = 48 km.

Answer: D
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A bird is flying from an oak tree to a pine tree in a speed of 6 Km/h. 27 Mar 2021, 22:07
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