A car travels $100 K m$ east and then $100 K m$ south. Finally, it comes back to the starting point by the southeast route. Throughout the journey, the speed is constant at $60 K m / h .$ The average velocity for the whole journey if the time is taken is $3.3 h o u r s$ is

$60 K m / h r$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

$90 K m / h r$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

$0 K m / h r$

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

$180 K m / h r$

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
$0 K m / h r$

Step 1: Given data
we know that,
$v e l o c i t y = \frac{d i s p l a c e m e n t}{t i m e t a k e n}$

Step 2: Calculating displacement and velocity
Now, $d i s p l a c e m e n t = f i n a l p o s i t i o n - i n i t i a l p o s i t i o n$
Since the car comes back to its starting point, so, $d i s p l a c e m e n t = 0$
therefore, $v e l o c i t y = \frac{0}{3.3} h o u r = 0 k m / h r .$
Hence, option C is correct. $0 K m / h r .$

Suggest Corrections

Similar questions

Q. A car with non-uniform motion travels 100 km in 4 hours. What can be said about the speed of the car?

(a) Its speed is constant at 25 km/h during the journey.
(b) Its average speed is 25 km/h during the journey.
(c) Its speed is 25 km/h at the beginning and end of the journey and varies in between.
(d) Its speed is 25 km/h for most of the journey.

Q. A car travels

100 k m

at a speed of

60 k m / h

and returns with a speed of

40 k m / h

. Calculate the average speed for the whole journey.

In a journey of $100 k m$ , a car travels first $25 k m$ with a constant velocity of $50 k m h^{- 1}$ , then it covers next $50 k m$ in $15 m i n$ and remaining $25 k m$ it travels with a speed of $100 k m h^{- 1}$ . Determine the average speed of the car's journey.

Q. Between the two stations, a train uniformly accelerates from rest at first, then moves with constant velocity and finally decelerates uniformly to come to rest. If the ratio of the time taken is

1 : 8 : 1

and the maximum speed attained is

60 km/h

, then what is the average speed over the whole journey?

Q. A car travelling at a speed of

60

km/h takes

15

hours to complete a journey. What will be the time taken to complete the same journey by a train whose speed is

90

km/h?

Join BYJU'S Learning Program

A car travels 100Km east and then 100Km south. Finally, it comes back to the starting point by the southeast route. Throughout the journey, the speed is constant at 60Km/h. The average velocity for the whole journey if the time is taken is 3.3hours is

A car travels $100 K m$ east and then $100 K m$ south. Finally, it comes back to the starting point by the southeast route. Throughout the journey, the speed is constant at $60 K m / h .$ The average velocity for the whole journey if the time is taken is $3.3 h o u r s$ is