Question

A car covers 300 km at a constant speed. If its speed was 10 kmph more, it would have taken one hour

less to travel the same distance. Find the speed of the car.

a. 60 kmph c. 50 kmph b. 40 kmph d. 75 kmph​

Answer 1

Answer:

the answer is 50km/h

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Let speed of car be x km/h.

and total time in journey be 't'

then

Given x=

t

300

xt=300-----(1)

and if speed =x+10

time=t-1

x+10=

(t−1)

300

(x+10)(t-1)=300---(2)

xt-x+10t-10=300

10t-x=310-300=10

10t-x=10

10t-

t

300

=10

10t

2

−10t−300=0

t

2

−t−30=0

(t-6)(t+5)=0

t=6 & t



=−5

if t=6 then x=

6

300

=50

speed of car be 50 km/h

and time journey be 6 hrs.