Question

how many millimetres in 100000000 kilometres.

Answer 1

1 km = 1000000 mm
100000000 km = 100000000 X 1000000 mm
                         = 100000000000000 mm --ans
you can also say 10 to the power 14 milli metres  

Answer 2

Answer:

we know that

1 km = 10^6 mm

so

10^8 km= 10^8×10^6

= 10^14 mm