Question

Page No.
Date
2] A bus Convers a certain distance with
uniform Speed
Speed if the speed of the bus
would have been increased by 15 km/ho,
it would have taken two houres less to
cover same distance. If the speed of the
bus would have been decreased by
5 km/hr. It would have taken one ho
more
to cover
the same distance. find
the distance covered
by bus.​

Answer 1

Step-by-step explanation:

Let the speed of express train be x km/h

Let the speed of passenger train be y km/h

x=y+10..........(i)

Time is defined as the ratio of distance to speed.

Time of express train is less than passenger train by 2 h

x400+2=y400...........(ii)

Substituting value of x from (i) in (ii), we get:

y+10400+2=y400

Rearranging terms, we get:

y2+10y−2000=0

y2+50y−40y−2000=0

(y+50)(y−40)=0

y=−50,40

Speed cannot be negative.