Water use regulations in a community: a family must pay at least 20 yuan for water (within 10 tons) per month, and the price of more than 10 tons will be charged at 2.5 yuan per ton. Xiao Ming’s house paid 95 yuan for water this month due to renovations. How many tons of water does Xiao Ming’s house use this week?
某小区用水规定：每个月一个家庭至少要交20元水费(10吨以内)，超过10吨的部分，按每吨2.5元的价格加收．小明家这个月因搞装修交了95元水费，请问小明家这周用水多少吨？
<gadget id="calculator">95 - 20</gadget>
<output>75</output>

<gadget id="calculator">75 / 2.5</gadget>
<output>30</output>

<gadget id="calculator">30 + 10</gadget>
<output>40</output>

<result>40</result>