document.write( "Question 947651: a car travelled 25km at an average speed of xkm\h.if its speed was increased by 5km\h it covers the distance 15minutes earlier what is the original speed of car? \n" ); document.write( "

Algebra.Com's Answer #578301 by MathTherapy(10552) $\"\"$ $\"About$

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a car travelled 25km at an average speed of xkm\h.if its speed was increased by 5km\h it covers the distance 15minutes earlier what is the original speed of car?
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document.write( "At least he/she was honest about his/her inability to solve this problem!!\r
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document.write( "With average speed being x, time taken to travel 25 km = 
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document.write( "Increasing speed by 5 km/h means that its speed becomes: x + 5
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document.write( "Time taken to cover distance at new speed of x + 5: 
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document.write( "We then get: , which becomes: 
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document.write( "25(4)(x + 5) = 25(4x) + x(x + 5) -------- Multiplying by LCD, 4x(x + 5)
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document.write( "(x - 20)(x + 25) = 0
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document.write( "x, or original speed =  km/h	         OR           x = - 25 (ignore) \n" );
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