1.

Pls.solve it. I m in problem.

Answer»

Distance between 2 point =90 km
let VELOCITIES be a and b
When they move in same direction ,
distance travelled by A = a*9 km
distance travelled by B =b*9 km
let speed of A be more than B so it will cover more distance than B
9a =9B + 90
a - b=10
When they move in OPPOSITE dirrection
distance traveled by A=9a/7
distance travelled by B=9b/7
they both travel distance of 90km
so,9a/7 + 9b/7 = 90
a + b = 70
solving both equations in a and b,
we get 2A = 80. a =40
b= 70- 40=30
speeds are 30km/h and 40km/h


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