# (i) Express 5 cm in metre and kilometre

(ii) Express 35 mm in cm, m and km

**Solution:**

We use the basic concepts of fractions to answer the question given.

We solve the above question by representing the part as a fraction of the whole.

(i) 5 cm

∵100 cm = 1m

∴1 cm = 1/100 m

5 cm = 5 × 1/100 m

5 cm = 0.05 m

Also, 1000 m = 1 km

∴1 m = 1/1000 km

Thus,

0.05 m = 0.05 × 1/1000 km

= 0.00005 km

(ii) Express 35 mm in cm, m and km.

∵10 mm = 1 cm

∴1 mm = 1/10 cm

35 mm = 35 ×1/10 cm

35 mm = 3.5 cm

Now, converting 3.5 cm to m, we get

∵100 cm = 1 m

∴ 1 cm = 1/100 m

3.5 cm = 3.5 × 1/100

3.5 cm = 0.035 m

Again, converting 0.035 m into km

∵1000 m = 1 km

∴ 1 m = 1/1000 km

0.035 m = 0.035 × 1/1000 km

0.035 m = 0.000035 km

**☛ Check: **NCERT Solutions for Class 7 Maths Chapter 2

**Video Solution:**

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

NCERT Solutions Class 7 Maths Chapter 2 Exercise 2.5 Question 3

**Summary:**

(i) 5 cm in metre and kilometre are expressed as 0.05 m and 0.00005 km respectively. (ii) 35 mm in cm, m and km are expressed as 3.5 cm, 0.035 m and 0.000035 km respectively.

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