An Aeroplane starts from an arodrome
at.15:15 :45am, and reaches another
Station after traveling
for 3:44:15 hour
at .what time aeroplane reach
the another station.
Answers
Answer:
An aeroplane left 50 minutes later than its scheduled time, and in order to reach the destination, 1250 km away, in time, it had to increase its speed by 250 km/hr from its usual speed. Its usual speed is -___.km/hr
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Answer
Correct option is
A
500
⇒ Let the usual speed of airoplane be xkm/hr.
⇒ Then, increased speed of the airoplane =(x+250)km/hr
⇒ Time taken by the airoplane under usual speed to cover 1250km=
x
1250
hr
⇒ Time taken by the airoplane under increased speed to cover 1250km=
x+250
1250
hr
⇒
x
1250
−
x+250
1250
=
60
50
⇒
x(x+250)
1250(x+250)−1250x
=
6
5
⇒
x
2
+250x
1250x+312500−1250x
=
6
5
⇒
x
2
+250x
312500
=
6
5
⇒ 312500(6)=5(x
2
+250x)
⇒ 1875000=5x
2
+1250x
⇒ 5x
2
+1250x−1875000=0
⇒ x
2
+250x−375000=0
⇒ x
2
−500x+750x−375000=0
⇒ x(x−500)+750(x−500)=0
⇒ (x−500)(x+750)=0
∴ x=500 and x=−750
Speed can not be negative.
∴ The usual speed of airoplane is 500km/hr.
Step-by-step explanation:
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Answer:
7:00:00 p.m.
this is true ans