Question

Why don't we measure all lengths in just one standard unit of length such as the metre,
instead of having multiples and submultiples?

Answer 1

Answer:

because if we use smaller one than the big distance would be very long and if we use longer scale than small lengths would come in disimal

Explanation:

ok

Answer 2

Answer:

WE MEASURE ALL LENGTHS IN JUST ONE STANDARD UNIT OF LENGTH SUCH AS THE METRE, INSTEAD OF HAVING MULTIPLES AND SUBMULTIPLES for having different joins make estimation simple. So for ease we convert it to a kilometer or other bigger units.