Distance =360 km
Speed =x km/hr
When speed is increase (x+5) km/hr
Given expression is written as,
⇒360x−360(x+5)=1
⇒x+5−xx(x+5)=1360
⇒x2+5x=1800
⇒x2+5x−1800=0
⇒x2+45x−40x−1800=0
⇒x(x+45)−40(x+45)=0
⇒(x+45)(x−40)=0
⇒x=40,−45
But, speed can not be negative.
Hence, speed is 40 km/hr