Plasticine ball

Plasticine balls have radius r₁=85 cm, r₂=60 mm, r₃=59 cm, r₄=86 cm, r₅=20 cm, r₆=76 mm, r₇=81 mm, r₈=25 mm, r₉=19 mm, r₁₀=14 cm. These balls are molded into one big ball. Calculate the radius r of the resulting ball.

Correct answer:

r =  113.6 cm

Step-by-step explanation:

$r=\sqrt[3]{{85}^3+6^3+{59}^3+{86}^3+{20}^3+{7.6}^3+{8.1}^3+{2.5}^3+{1.9}^3+{14}^3}=113.6\text{cm}$

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