Question

63/x + 72/x+6 = 3 find the roots of equations​

Answer 1

Answer:

Let average speed be x km/hr.

x

63

+

x+6

72

=3

21(x+6)+24x=x

2

+6x

x

2

−39x−126=0

(x−42)(x+3)=0

x=42 km/hr