Answers

  • Brainly User
2015-02-06T18:57:38+05:30
ORIGINAL SPEED=1500/X
ACCORDING TO THE CONDITION = 1500/X  + 250
TIME IS 1/2 THE (AS SPEED IS IN HRS)

1500/X  - 1500/X + 250 = 1/2
........................................
.......................................
X = 750Km/hr
0
2015-02-09T17:36:28+05:30
ORIGINAL SPEED=1500/X
ACCORDING TO THE CONDITION = 1500/X  + 250
TIME IS 1/2
1500/X  - 1500/X + 250 = 1/2

1500(x+250)-1500x/x²+250x=1/2
375000/x²+250x=1/2
750000=x²+250x
x²+250x-750000=0
(x+1000)*(x-750)=0
x= -1000 or x= 750
speed=750 km/hr

1 5 1