Question

A driving wheel of a locomotive engine is 2.1 metre in radius find the distance covered when it has made the 800evolution

Answer 1

We have, radius, r = 2.1 m

So, Circumference =  2πr = 2*22*2.1/7

                               = 13.2 m

So, Distance covered in 800 revolutions = 13.2*800 = 10560 m = 10.56 km

Answer 2

Answer:

Step-by-step explanation:

we need to change the meters into centimeter

circumfernce= 22/7 x 210 x2

                     = 1320 cm

distance = number of evolution x   circumfence

                = 800 x 1320

                 = 105600

                = 10.56 km