Time (sec) 7. Find the value of cos 1.74 from the following table: : 1.7 sin x: 0.9916 1.74 0.9857 1.78 0.9781 1.82 0.9691 1.86 0.9584 8. The distance covered by an athlete for the 50 metre is given in the following table: (J.N.T : 0 Distance (metre) : 0 1 2.5 2 3 4. 5 6 8.5 15.5 24.5 36.5 50 Determine the speed of the athlete at t = 5 sec. correct to two decimals. (U.P.7 Year Population (in lacs): 1931 40.62 1941 in 60.80 9. The population of a certain town is given below. Find the rate of growth of the population in 1961: 132.65 (Anna, 2012; U.P.1 10. The following data gives corresponding values of pressure and specific volume of a superheated stream. 1951 71.95 1961 103.56 1971 0: P: g 105 4 42.7 6 8 10 25.3 16.7 13 Find the rate of change of (i) pressure with respect to volume when v = 2, (ii) volume with respect to pressure when p = 105.