Question

a car covers a distance of 33 km into 30 minutes . what is its speed in km/hr
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Answer 1

Answer:

The formula we need to look at here is:

Speed = distance / time

The question that you posed requests the speed, but you should also notice that your question actually gives you the two other items needed for this formula. If we put in the information we know…

Speed = 30km / one half hour

So the speed of the vehicle is 30km per half an hour.

As we normally use the distance achieved over an hour to denote speed, we need to double the half an hour. And if we double the half an hour, and travel at the same speed, we can double the distance.

So you get

Speed = (30km X 2) / (one half hour X 2)

Speed = 60km / 1 hour

Or 60km/h

Answer 2

Step-by-step explanation:

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

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