Question

the diameter of wheel is 35cm. the distance travelled by by the wheel , if it makes 50 revolution

Answer 1

radius wheel (R) = 35/2 cm 
distance travel in 1 revolution = 2πR = 2x (22/7) x (35/2) = 110 cm
so distance travel in 50 revolution = 50 x 110 = 5500 cm

Answer 2

Hey there !!

Given that ,

r = 35/2

circumference = 2πr

No. of revolution = 50

total Distance travelled by the wheel = 2πr ×50

=>
$100 \times \frac{22}{7} \times \frac{35}{2} \\ \\ = >100 \times 11 \times 5 \\ = > 100 \times 55 \\ = > 5500 \: cm \\ = > \frac{5500}{1000} \\ = > 5.5 \: km$
Hence the Distance travelled by the wheel is 5.5 km

Hope this helps u!!