Question

The speed of the bus is 72km/h, whereas the speed of the car is 12.5m/s. Which vehicle

moves faster?

​

Answer 1

Explanation:

HEY MATE

➡️As we know that in order to convert the units of speed given in km/h to a speed whose units will be m/s.

➡️ we will multiply the value of the speed whose units are km/h with 518.

➡️Therefore, the speed of the car is greater than the speed of the bus.

➡️This means that the vehicle which moves faster is a car not a bus.

Answer 2

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Given:

Speed of bus = 72 km/hr

Speed of car = 12.5 m/s

To find:

Which vehicle moves faster = ?

Solution:

Here, speed of bus is in kilometer per hour while speed of car is in metre per second

So, we will convert speed of bus in metre per second for easy comparison with car

1 km = 1000 m

1 hour = 60 × 60 = 3600 secs

$\\ \\ 72 \dfrac{km}{h} \\ \\ = 72 \times \dfrac{1 \times 1000 \: m}{1 \times 3600 \: sec} \\ \\ = 72 \times \dfrac{10 \: m}{36 \: sec}$

$\\ \\ = \dfrac{720 \: m}{36 \: sec} \\ \\ = 20 \: metre \: per \: sec$

On comparing,

Speed of car = 12.5 m/s

Speed of bus = 20 m/ s

Thus, speed of bus is more than car.

Required answer:

Therefore, Bus moves faster than car as per given data

Knowledge booster:

# In unit conversion, while converting kilometer to meter, we have to multiply kilometer with 1000. On other hand, while converting meter to kilometer we have to divide meter with 1000

# Example: 1 cm to meter

100 cm = 1 m

1 cm = 1/ 100 = 0.01 metre

# Solve more such unit conversion questions to get good hold on it