Question

A factory produces 228 energy bulbs in a week. How many does it produce in a year.Give the estimate of your answer and then find the actual answers.

Answer 1

No. of bulbs produced by a factory in one week = 228 bulbs...... No. of weeks in a year = 49 weeks .......................................... .No. of bulbs produced in one year by the factory = 228× 49....... =11172 energy bulbs.

Answer 2

$One\ year\ has\ 52\ weeks.\\\\228\approx230\ and\ 52\approx50\\\\The\ estimate\ of\ answer:230\times50=\fbox{11,500}\\\\The\ actual\ answer:\\365:7\approx52.143-weeks\\\\52.143\times228=11,888.604\approx\fbox{11,889}$