Question

(1) Length of the nail — 2 cm and ____ mm or 2. ____ cm.


(2)
The length of this lady finger (bhindi) is ______ cm and ______ mm. We can also write it as ______ cm.

(3) Using the scale on this page find the difference in length between candle 1 and candle 3.

Length of	Length in cm and mm	Length in cm
Candle 1
Flame 1
Candle 2
Flame 2
Candle 3
Flame 3

Answer 1

(1) Length of nail = 2 cm 9 mm
Now, 10 mm = 1 cm

1 mm = $\frac{1}{10}$ cm

9 mm = 0.9 cm

So, 2 cm 9 mm = 2.9 cm

(2) Length of lady finger is 8 cm and 4 mm
Now, 10 mm = 1 cm

1 mm = $\frac{1}{10}$ cm

4 mm = 0.4 cm

So, 8 cm 4 mm = 8.4 cm


(3)

Length of	Length in cm and mm	Length in cm
Candle 1	2 cm 9 mm	2.9 cm
Flame 1	1 cm 3 mm	1.3 cm
Candle 2	4 cm 9 mm	4.9 cm
Flame 2	1 cm 9 mm	1.9 cm
Candle 3	6 cm	6.0 cm
Flame 3	1 cm 9 mm	1.9 cm