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HMMT 二月 2016 · 冲刺赛 · 第 5 题

HMMT February 2016 — Guts Round — Problem 5

专题
Contest Math / 竞赛数学
难度
L3
来源
HMMT

题目详情

英文原题

  1. [ 6 ] Patrick and Anderson are having a snowball fight. Patrick throws a snowball at Anderson which isshaped like a sphere with a radius of 10 centimeters. Anderson catches the snowball and uses the snowfrom the snowball to construct snowballs with radii of 4 centimeters. Given that the total volume ofthe snowballs that Anderson constructs cannot exceed the volume of the snowball that Patrick threw,
    how many snowballs can Anderson construct?
解析

英文解析

  1. [ 6 ] Patrick and Anderson are having a snowball fight. Patrick throws a snowball at Anderson which isshaped like a sphere with a radius of 10 centimeters. Anderson catches the snowball and uses the snowfrom the snowball to construct snowballs with radii of 4 centimeters. Given that the total volume ofthe snowballs that Anderson constructs cannot exceed the volume of the snowball that Patrick threw,
    how many snowballs can Anderson construct?
    Proposed by:
    Answer: 15
    ⌊ ⌋
    ( ) ⌊ ⌋
    10 1253 = = 15 .
    4 8