Question

a car covers a distance of 240km in 3 hours what is the speed of the car​

Answer 1

ANSWER

Let the speed of the car be s and time be t

Then, st=240⟹s= t

240

and (s+20)(t−2)=240

(

t

240

+20)(t−2)=240

(20t+240)(t−2)=240t

20t

2

+240t−480−40t=240t

20t

2

−40t−480=0

t

2

−2t−24=0

(t−6)(t+4)=0

t=−4,6

Hence, time is 6 hr

and speed =

6

240

=40km/hr

Answer 2

Answer:

80kmph

Explanation:

Speed=Distance/time

=240/3

=80kmph