Question

3.
(i) Express 10 cm in metre and kilometre.
(i) Express 45 mm in centimeter, meter and kilometer.​

Answer 1

i) 10cm = 10 × 1/100 m

= 1/10 m or 0.1 m

1/10 m = 1/10 × 1/1000 km

= 1/10000 km

= 10^-4 km or 0.0001 km

ii) 45 mm = 45 × 1/10 cm

= 4.5 cm

4.5 cm = 4.5 × 1/100 m

= 0.045 m

0.045 m = 0.045 × 1/1000 km

= 0.000045 km

1 mm = 1/10 m

1 cm = 1/100 m

1 m = 1/1000 km