解:依题意(2*10+5)*365*15=136875=1.36875*10^5(5次方)(千克)
2.0*10^5*15*365=1.095*10^9Kg
15*365*2.0*19^5=1.2711328405*10^10
2.0X10又5? ,答案=( 2.0X10又5)*15*365