Question

Fill in the blanks
(a) The volume of a cube of side 1 cm is equal to ..... m3
(b) The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to ...(mm)2
(c) A vehicle moving with a speed of 18 km hñ1 covers .... m in 1 s
(d) The relative density of lead is 11.3. Its density is ....g cm^-3 or ....kg m^-3.
NCERT Solutions for Class 11 Physics Part 1 Chapter 2 Exercise 1

Answer 1

1.    1cm³ =  10⁻⁶ m³

2.     2 * π 20² + π 20 * 100  mm² =  2800 π  mm²

3.    18 kmph = 18 * 5/18 = 5 m/sec    =>    covers 5 m in 1 sec

4.     R.d = 11.3        => density = 11.3 gm/cm³    = 11,300 kg/m³
              

Answer 2

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1) 1 cm3 = 10^–6 m3

2) 1.5 × 104 mm2

3) 5 m in 1 s.

4) 11.3 g/cm3 = 11.3 × 103 kg/m3

I hope, this will help you

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