the ice is now heated and it is melted at a rate
(2t-61) cm^3 per second.
Find the time required to melt the ice. ANS=64s
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The following is my solution, i don't know what's wrong?
Time (s) ice melted
1 2*1-61=-59
2 59+2*2-61=-116
3 -116+2*3-61=-171
4 -171+2*4-61=-224>192
更新1:
Time (s) / ice melted 1 / 2*1-61=-59 2 / 59+2*2-61=-116 3 / -116+2*3-61=-171 4 / -171+2*4-61=-224>192
更新2:
i just want to know what's wrong of my solution!!
更新3:
what is the meaning of -59? is it melting 59 cm^3 of ice in 1 second? or melting 0 cm^3 of ice in 1 second? or condense 59 cm^3 of ice in 1 second?
