Question

How many times will the wheel of a car rotate in a journey of $15.40$ km if the radius of the wheel is $49$ cm

• A. $500$
• B. $5000$
• C. $50$
• D. None

Answer 1

The correct option is B $5000$

We have,

$2\pi rn=$ distance convered $=15.4km$ (given)
$n=\frac{15.4\times {10}^3\times 7}{2\times 22\times 0.49}=5000$