Along the length of a beam the extensional as well as compressive strains have been recorded at the top level and 150 mm below it across the depth as 4*10^-6 and 1*10^-6 respectively. the total depth of the beam is 240 mm. if A1 and A2 are the areas of the cross section under tension and compression, the ratio A1/A2 will be recorded at the top level and 150 mm below it across the depth as 4x10 and 1106 -6 respectively. The total depth of the beam is 240 mm. If A and A are the areas of the cross section under tension and compression, the ratio A/A will be (a) 2.5 (b) 4.0 (c) 1.0 (d) 5.0