一到英文数学题Mary’s height increased by 20% between her 5th birthd
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一到英文数学题
Mary’s height increased by 20% between her 5th birthday and her 10th birthday.It increased by 15% between her 10th birthday and her 15th birthday,and it increased by 10% between her 15th birthday and her 20th birthday.By how much did her height increase between her 5th birthday and her 20th birthday?
Mary’s height increased by 20% between her 5th birthday and her 10th birthday.It increased by 15% between her 10th birthday and her 15th birthday,and it increased by 10% between her 15th birthday and her 20th birthday.By how much did her height increase between her 5th birthday and her 20th birthday?
设mary 5岁时体重为1,
那么她十岁时,体重为:1*(1+20%)=1.2,
她15岁时,体重为:1.2*(1+15%)=1.38,
她20岁时,体重为:1.38*(1+10%)=1.518,
所以她20岁时比5岁时,体重增加了,51.8%
那么她十岁时,体重为:1*(1+20%)=1.2,
她15岁时,体重为:1.2*(1+15%)=1.38,
她20岁时,体重为:1.38*(1+10%)=1.518,
所以她20岁时比5岁时,体重增加了,51.8%
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