Question

Q6. n Q7, pls..give me answers

Answer 1

here is your answer by Sujeet

let to be car A=x km
let to be car B =y km

Then,
A/q

Distance travel by Car A in 1 hour=x km
Distance travel by Car B in 1 hour =ykm
A/q
Totally distance travel..
x+y=100

Again,
Case 2

Distance travel by car A= 5 km
Distance travel by car B=5 km

Total distance travel =5x-5y=100
5(x-y)=100
x-y=20

Solving the equation by elimination method,
x-y=20
x+y=100
_______
-2y=-80
y=80/2
y=40

Now Putting the way of y in another equation,
x-y=20
x-40=20
x=20+40
x=60


Now, speed of car A=60km/hr
Speed of Car B=40km/hr

That's all

Sujeet