1. What is the diameter (in cm) of a sphere of surface area 154 sq cm?





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  • By: anil on 05 May 2019 01.45 am
    Surface area of sphere = 154 $$4pi r^{2} = 154$$
    $$4 imes frac{22}{7}r^{2} = 154$$
    $$r^{2} = 12.25$$ $$r = 3.5$$ $$diameter = 2r = 7$$ So the answer is option D.
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