Question

how do you get revolution of wheel with diameter as 84cm and has covered 3.3km

Answer 1

1 revolution of the wheel = pi *84 cm = 263.89 cm
There are 100*1000 = 100,000 cm in 1 km so:-
Number of revolutions when travelling 3.3 km   = (3.3* 100,000) / 263.89 = 1250.5 revolutions