Question

A car covers a distance of 400 km at a certain
speed. Had the speed been 12 km/h more
the time taken for the journey would have beer
1 hour 40 minutes less. Find the original speet
of the car.
[2012]​

Answer 1

Step-by-step explanation:assume speed=x400/x+12 - 400/x = 100/60 (convert 1hr 40 into fraction) 400x-(400x+4800) /x²+12x = 5/34800=5/3(x²+12x) 3(4800) =5x²+60x14,400=5x²+60xdivide by 52880=x²+12xx²+12x-2880=0

solve this eq to get final answer!!!

I know u can do this.... thank you and mark as brainliest <3

Answer 2

Answer:

48Km/h

Step-by-step explanation:

please refer to the attachment.....