Question

answer my question no 30 please guys its urgent??

Answer 1

Answer:

15.84 km/hr

Step-by-step explanation:

Given, Diameter of wheel = 60 cm.

Radius of the wheel = 30 cm.

Circumference = Distance covered in 1 revolution = 2πr

= 2 * 22/7 * 30

= 1320/7 cm.

So, distance covered in 140 revolutions:

= 1320/7 * 140

= 26400 cm.

= (264/1000) km.

Now,

Distance covered in 1 minute:

= (264/1000) km.

Then,

Distance covered in 1 hour:

= (264/1000) * 60

= 15.84 km.

Therefore, Speed = 15.84 km/hr.

Hope it helps!