NCERT Solutions Class 11 Physics Chapter 1 Units and Measurements is prepared by our senior and renowned teachers. Primary focus while solving these questions of class 11 in NCERT textbook, also do read theory of this Chapter 1 Units and Measurements while going before solving the NCERT questions. Question 1.1. Fill in the blanks : a. The volume of a cube of side 1 c m 3 = .... m 3 . b. The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm =.. (mm) 2 . c. A vehicle moving with a speed of 18 km h –1 covers .... m in 1 s. d. The relative density of lead is 11.3. Its density is .... g cm –3 or .... kg m –3 . Solution : a. Length of edge = 1cm = $\frac{1}{100}$ m Volume of the cube = side 3 Putting the value of side, we get Volume of the cube = ( $\frac{1}{100}$ m) 3 =(10 -2 m) 3 = 10 -6 m 3 . The volume of a cube of side 1 cm = 10 -6 m 3 b. Given, Radius, r = 2.0 cm = 20 mm (convert cm to mm). Height, h = 10.0 cm =100 mm. The formula of total surface area of a...