Math Question: A life of a bulb is partly constant and partly inverse proportional to its average usage. When average usage is 10 hours its life is 810 hours, when average usage is 20 hours its life is 805 hours. If the life of bulb is 1000 hours what will be its average usage? A) 1 hour B) 2 hour C) 0.5 hour D) 1.5 hour

Asked By Achint On 08/07/2019 12:16