Question

If V= 43 π r³, find (i) the value of "V" when r = 7 (ii) the value of "r" when V = 256
with solution please

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Answer 1

Step-by-step explanation:

(i). value of v, when r = 7

V = 43 π (7)³

» π = 22 ÷ 7 or 3.142

V = 43 × 3.142 × 343

V = 46,341.36 Ans!!

(ii) value of r, when v = 256

256 = 43 × 3.142 × r³

256 = 135.11 r³

256 ÷ 135.11 = r³

r³ = 1.89

taking cube root on both sides

³√r³ = ³√1.89

r = 1.37 Ans!!

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