A man riding a bicycle covers a distance of 60km in the direction of the the wind andcomes back to his original position in 8 hrs.If the speed of the wind is 10 km/hr find the speed of the bicycle.
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Answered by
2
Answer:
ANSWER
Let speed of bicycle be x
Then,
x+10
60
+
x−10
60
=8
60x−600+60x+600=8(x
2
−100)
120x=8x
2
−800
x
2
−15x−100=0
x
2
−20x+5x−100=0
(x−20)(x+5)=0
x=20,−5
Speed cannot be negative.
Hence, speed of bicycle is 20 km/hr
Answered by
0
Answer:
Answer
Let speed of bicycle be x
Then,
x+10
60
+
x−10
60
=8
60x−600+60x+600=8(x
2
−100)
120x=8x
2
−800
x
2
−15x−100=0
x
2
−20x+5x−100=0
(x−20)(x+5)=0
x=20,−5
Speed cannot be negative.
Hence, speed of bicycle is 20 km/hr
Step-by-step explanation:
thnx my ans
alov00722:
Can U explain your answer?
Answer
Let speed of bicycle be x
Then,
x+10
60
+
x−10
60
=8
60x−600+60x+600=8(x
2
−100)
120x=8x
2
−800
x
2
−15x−100=0
x
2
−20x+5x−100=0
(x−20)(x+5)=0
x=20,−5
Speed cannot be negative.
Hence, speed of bicycle is 20 km/hr
Let speed of bicycle be x
Then,
x+10
60
+
x−10
60
=8
60x−600+60x+600=8(x
2
−100)
120x=8x
2
−800
x
2
−15x−100=0
x
2
−20x+5x−100=0
(x−20)(x+5)=0
x=20,−5
Speed cannot be negative.
Hence, speed of bicycle is 20 km/hr
not this answer
The answer U've given in Physics
in my question
sorry i sont know
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