Question

the height of a cone is 30cm and its volume is 3140cm^3. taking (pie) as=3.14 find i) the radius of the base 2)area of the base

Answer 1

Answer:

Step-by-step explanation:

Given volume of the cone = 3140 cm³

We know that,

Volume of the cone = $\frac{1}{3}$πr³

                        3140 = $\frac{1}{3}$×3.14×r³

                        3140 = 314/300×r³

                          r³ = 3140×300/314

                          r³ = 3000    [∵3140/314 = 10]

                          r = ∛3000

                          r = 14.42cm

1. radius = 14.42 cm

2.Area of the base = πr²=3.14*14.42*14.42=652.92 cm²

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