Height of a person is 1m 65cm. His height in millimetres is ____.
1650 mm
Step 1: Know the unit facts
\(1\,\text{m} = 100\,\text{cm}\)
\(1\,\text{cm} = 10\,\text{mm}\)
So, \(1\,\text{m} = 100\times 10 = 1000\,\text{mm}\).
Step 2: Convert the metres to millimetres
\(1\,\text{m} = 1000\,\text{mm}\)
Step 3: Convert the centimetres to millimetres
\(65\,\text{cm} = 65\times 10\,\text{mm}\)
\(65\times 10 = 650\)
So, \(65\,\text{cm} = 650\,\text{mm}\).
Step 4: Add both parts
\(1000\,\text{mm} + 650\,\text{mm} = 1650\,\text{mm}\)
Step 5: Write the answer
\(1650\,\text{mm}\)