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00:00 - 00:59 | questions that is swimming pool is to be drained by cleaning if I'll represent the number of litres of water in the pool in the pool and 30 seconds after and 30 seconds after the pool has been flagged off to the dream and we are given the relation between l l and time is equals to L is equal to 2010 - 3 whole square so we can find that how fast is the water running out at the end of 5 seconds then what is the average rate at which the water flows out during the first five seconds to find and given the relation between l and time is equal to |

01:00 - 01:59 | 2010 - 3 whole square and sure to find how much teleporter running out at the end of i s Sofia to find DL by DT we have to find DL DT it contains - and because the water is running out it condition negative science where to find it so we can write TS DL DT is equal to 2000 into 2 into 10 - and here we have - 1 and also mention also contain it contains also negative sign because the water is running of the running water is running out so that is container -93 can write it and put x = 25 second show - 2008 |

02:00 - 02:59 | 210 - 5 and - 120 got the value dear when it is equals to we can fighters nearby it is equal to 10 from here cot 10 and it Katni it comes to your 20000 litre per second the value of DL by DT and this is the this is the final Re the final running yet so this is our final date and now another view to find the average it so we can write as average rate we can write the test average rate is equals to average rate is equal to initial rate plus final rate / 2 superstar where to find initial rate now our problem to find initial rate where to find initial |

03:00 - 03:59 | rate at at time T = 0 to rdl by DT we can write sdl b is equal to 2002 into 10 minus is equal to zero so we got together we can write s 40000 tinnitus 40000 now put initial rate and final rate in the place of ancient mission there in pilot to find average hit so we got average rate so we can write an average rate is equals to 40,000 + 20000 / 2 now final answer will be average average rate 30000 l what |