Question

a) 0.45 km = _________ cm ??
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Answer 1

Hi,

We know

$\orange{\bigstar}\:\:{\underline{\boxed{\bf\red{1Km\: = \:1000cm}}}}$

∴45mm = 1000 × 45cm 

So, 45km = 45000 cm

Answer 2

1 km = 100000 cm

So,

0.45 km = 100000 x 0.45 cm

= 45000 cm