Question

2) If the speed of a car is decreased
by 8 km Ihr it takes I hour more to
a distance of 240 km. find
the
original speed of the car.
cover
​

Answer 1

Answer:

actually you know you have not wrote the question properly there are some mistakes in it and at last u wrote cover.... so I didn't got ur question

Answer 2

Step-by-step explanation:

let the speed be s

and the time be t

then

d= s×t

240= st

240/s= t

again,

dreaseing speed by 8 = s-8

time will increase by 1= t+1

(s-8)(t+1)= 240

(s-8)(240/s +1) = 240

240+s-1920/s-8=240

s-1920/s-8=0

(s²-1920-8s)/s=0

s²-8s-1920= 0

s²+40s-48s-1920=0

s(s+40)-48(s+40)=0

(s+40)(s-48)=0

s-48=0

s=48

hence speed of car is 48km/hr

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