Question

Please solve this as soon as possible.
Quadratic Equation

Answer 1

distance=196 km
(let) time(train)=x hr
speed(train)=196/x km/hr
distance=196 km
speed(car)=(196/x + 21) km/hr
= (196+21x)/x km/hr
time(car)=196/((196+21x)/x) hr
=196x/(196+21x) hr
Total time=11 hr
A.T.P
x+196x/(196+21x)=11
By solving;
x=7 hr
Time by train=7hr
Speed(train)=196/7 hr=28 km/hr
Speed (car)=(28+21) hr=49 km/hr