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Total surface area = 231 cm2 Curved surface area = 2/3 x 231 = 154 cm2 Curved surface area of cylinder = 2πrh ⇒ 2πrh = 154 ⇒ 2 × (22/7) × r × h = 154 ⇒ r × l = 24.5 Total surface area of cylinder = 2πr(r + h) ⇒ 2πr(r + h) = 231 ⇒ r(r + h) = 36.75 ⇒ r2 + rh = 36.75 ⇒ r2 = 36.75 - 24.5 ⇒ r2 = 12.25 ⇒ r = 3.5 cm Volume of cylinder = πr2h ⇒ π × r × (r × h) ⇒ π × 3.5 × 24.5 ⇒ 269.5 cm ∴ The volume of the cylinder is 269.5 cm3 .
Seven toddlers T1, T2, T3, T4, T5, T6 and T7 are sitting around a circular table, facing towards the centre (not necessarily in the same order). T5 is t...
Who among the following does not belong to the group?
Six people, G, H, I, J, K and L are sitting around a circular table facing towards the centre (but not necessarily in the same manner). One person is si...
How many persons sits between E and B when counted anticlockwise from E?
Who sits third to the left of the person who faces I?
Four of the five among the following are similar in such a way to form a group, which one of them doesn’t belongs to the group?
Who among the following sits opposite to O?
Who among the following sits at extreme end of the row?
Who is R’s husband?
Which of the following statements is definitely true as per the given arrangement?