

Given, 60 * (1.0/4.9) * 10-6 * 0.91 * 1011
= 60 * (1/49) * 0.91 * 1011-6
= 60 * (1/49) * (91/100) * 105
= 6 * (1/49) * (91/10) * 105
= {(6 * 91)/49} * 105-1
= {(6 * 13)/7} * 104
= (78/7) * 104
= 11.143 * 104
= (1.1143/10) * 104
= 1.1143 * 104-1
= 1.1143 * 103
