Question

The diameter of a tyre of a vehicle is 70 cm. If the tyre makes 50,000 complete revolutions in a particular journey, calculate the length of the journey in kilometers. (π = ²²/7) Explain.

Answer 1

Step-by-step explanation:

110 km answer........................

radiur=diameter/2

=70/2

=35

circumference= 2πr

in one round it cover =2*22/7*35

=2*22*5

=220

in 50,000round it cover=220*50,000

=11000000cm

in km. =110km

Answer 2

Answer:

110 km

Step-by-step explanation:

diameter of the tyre = 70 cm

radius of the tyre = 70/2 = 35 cm

Therefore,

distance covered in 1 revolution

= circumference of the circle

= $2\pi r$

= $2*\frac{22}{7} * 35$

= $2 * 22 * 5$

= $10 * 22$

= $220$ cm

Thus, total distance covered

= no.of revolutions * distance covered in 1 revolution

= $50000 * 220$ cm

= $1,10,00,000$ cm

= $\frac{1,10,00,000}{1,00,000}$ km

=$110$ km