Question

A small cart is being driven at 10 km per hour if each wheel is 91 cm in diameter find the number of revolution made by which will per minute

Answer 1

Radius of wheel= 91/2cm square
Total distance covered= 10*1000=10000m
10000*100=1000000cm
Perimeter of circle= 2πr
=2*22/7*91/2=286cm square
1 wheel cover 286cm square
so, in 1000000cm square wheel covered=1000000/286=3496 wheels approximately

Answer 2

Answer:

59

Step-by-step explanation:

Distance covered by cart in 1 hour = 10 km = 1000000 cm

Distance covered by cart in 60 minutes = 1000000 cm

Distance covered by cart in 1 minute = $\frac{1000000}{60}=16666.67$ cm

Diameter of wheel = 91 cm

Radius of wheel = $\frac{91}{2} cm$

Circumference of wheel = $2 \pi r = 2 \times \frac{22}{7} \times \frac{91}{2}=286$

Distance traveled in 1 rotation = 286 cm

No. of rotations in 286 cm = 1

no. of rotations in 1 cm = $\frac{1}{286}$

No. of rotations in 16666.67 cm = $58.275 \sim 59$

Hence the number of revolution made by cart in 1 minute is 59