Question

3. (i) Express 5 cm in metre and kilometre (ii) Express 35 mm in cm, m and km



NCERT STD 7​

Answer 1

Step-by-step explanation:

since,

THERE IS A FORMULA THAT: 1cm=1/1000km

1cm=1/100m

1mm=1/10cm

i)5cm=5×1/1000km

=1/200km

=0.0005km

ii)35mm=35×1/10cm

=3.5cm

35×1/1000m

=0.035m

35×1000000

=0.000035km

Answer 2

Step-by-step explanation:

3.(I) 1cm =0.01m

or

$\: 1 \: cm \: = \frac{1}{100} m$

So 5 CM = 0.05cm

(II) 1mm = 0.1cm

so 35mm = 3.5mm

1mm = 0.001m

so 35 mm = 0.035m

1mm = 0.000001 km

so 35mm = 0.000035 km

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