Earth Hour Day?? #shorts

Short Day Plants

A man working 8 hours a day takes 5 days to complete a project. How many hours a day must he work to complete. It in 4 days?

Mass remaining constant, if the earth suddenly contracts to one third of its present radius, the length of the day would be shorted by

If earth were to shrink to (1)/(8)th of its present volume, what would be the new length of the day in hour ?

A earns Rs. 80 per hour and work for 8 hours a day. B. earns Rs. 60 per hour and works for 6 hours a day. What is the ratio of per day wages of a and B?

Maryland mammoth tabacco is a short day plant. Its critical duration of darkness is 10 hours. Under which of the following conditons will it not flower?