Question

The wheel of a bullock cart has a diameter of 1.4 metre . How many rotations will the wheel complete as the cart travels 1.1 km

Answer 1

check the pic for answer

Answer 2

Answer:

251

Step-by-step explanation:

Diameter of Wheel of Bullock cart = 1.4 m

radius = 1.4/2 =  0.7 m

Circumference of wheel = $2\pi r$

                                         = $2\times 3.14 \times 0.7$

                                         = $4.396m$

So, it travels in 1 rotation = 4.396 m

1 m =0.001 km

4.396 m = 0.004396 km

Thus No. of rotations in 0.004396 km = 1

So, no. of rotations in 1 km = $\frac{1}{0.004396}$

So, no. of rotations in 1.1 km =$\frac{1}{0.004396} \times 1.1=250.22$

Hence the wheel complete as the cart travels 1.1 km 251 rotations