Question

A car moves with a speed of 40 km / h for 15 minutes an-d then with a speed of 60km / h for the next 15 minutes . The total distance Covered by the car is
1) 100km
2) 25kM
3) 15km
4) 10km

Answer 1

The answer is 10km

I hope it helps you

Answer 2

Given :

Given :· A car moved with a speed of 40 km/hr 60 km/hr for the next 15 minutes.

Given :· A car moved with a speed of 40 km/hr 60 km/hr for the next 15 minutes.for 15 minutes and then with a speed of

Given :· A car moved with a speed of 40 km/hr 60 km/hr for the next 15 minutes.for 15 minutes and then with a speed ofTo Find :

Given :· A car moved with a speed of 40 km/hr 60 km/hr for the next 15 minutes.for 15 minutes and then with a speed ofTo Find :· Total distance travelled by the body.

Given :· A car moved with a speed of 40 km/hr 60 km/hr for the next 15 minutes.for 15 minutes and then with a speed ofTo Find :· Total distance travelled by the body.Solution :

Given :· A car moved with a speed of 40 km/hr 60 km/hr for the next 15 minutes.for 15 minutes and then with a speed ofTo Find :· Total distance travelled by the body.Solution :We are given speed and time in different units, so first, we have to make them of same units like if the time is given in minutes then the speed should in distance travelled per minute.

We know, 1 hour = 60 minutes, so

We know, 1 hour = 60 minutes, so- 40 km/hr

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/min

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,- 60 km/hr

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,- 60 km/hr- 60/60 km/min

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,- 60 km/hr- 60/60 km/min- 1 km/min

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,- 60 km/hr- 60/60 km/min- 1 km/minNow, There are two situations,

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,- 60 km/hr- 60/60 km/min- 1 km/minNow, There are two situations,[1]

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,- 60 km/hr- 60/60 km/min- 1 km/minNow, There are two situations,[1]The car moved with a speed of 2/3

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,- 60 km/hr- 60/60 km/min- 1 km/minNow, There are two situations,[1]The car moved with a speed of 2/3min for 15 minutes, so we have

We know, 1 hour = 60 minutes, so- 40 km/hr- 40/60 x km/min4/6 km/min- 2/3 km/minAlso,- 60 km/hr- 60/60 km/min- 1 km/minNow, There are two situations,[1]The car moved with a speed of 2/3min for 15 minutes, so we haveSpeed = 2/3 km/min Time = 15 minutes

[2]

The body moved with a speed of 1 km/ min for again, 15 minutes. so we have

• Speed = 1 km/min Time = 15 minutes

Similarly, the distance travelled in this journey can be calculated as

Distance = Speed Time

d, = 1x 15

d2 = 15 km

Now, The total distance travelled by the car is the sum of Distances covered in both the situations, which is

- Total distance travelled = d; + d2

Total distance travelled = 10 + 15

Total distance travelled = 25 km

:. Option (1) is correct.