Question

A bus travels a total distance of 225km in 5hour.Find its average speed.​

Answer 1

Explanation:

total distance = 225km

time=5hours

average = 225/5 hours

= 45

Answer 2

Given :

• Total distance travelled by a bus is 225 km and time taken is 5 hours

To find :

• The average speed of the bus

Solution :

Average speed of a body is given by ,

$\boxed {\rm{average \: speed = \frac{total \: distance \: travelled}{total \: time \: taken} }}$

We have ,

• Total distance as 225 km
• Total time as 5 hours

By substituting the values ,

$: \implies \rm \: average \: speed = \frac{225 \: km}{5 \: hr} \\ \\ : \implies \rm \: average \: speed = 45 \: km. {hr}^{ - 1}$

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀(or)

Total Distance travelled = 225 km = 225 × 10⁻³ m = 0.225m

Total time = 5 hrs = 5 × 3600 s = 18,000 sec

By substituting the values ,

$: \implies \rm \: average \: speed = \frac{0.225 \: m}{18000 \: s} \\ \\ : \implies \rm \: average \: speed = \frac{225 \times {10}^{ - 3} \: m }{18 \times {10}^{3} \: s } \\ \\ : \implies \rm \: average \: speed = \frac{225 \: \times { {10}^{ - 3} \times 10 {}^{ - 3} \: m }}{18 \: s} \\ \\ \ : \implies \rm \: average \: speed = \frac{225 \times {10}^{ - 6} \: m }{18 \: s} \\ \\ : \implies \rm \: average \: speed = 12.5 \: m {s}^{ - 1}$

Hence , The Average speed of the bus is 45 km/hr (or) 12.5 ms⁻¹