Question

1.an electric bulb of 40w loss for 10 hours a day what is the amount to be paid in month of April If one unit of electrical electricity cost rupees 2.50?

2.a bullet of mass 20g is horizontally fired with a horizontal velocity 150m/s from pistol of mass 2kg.what is the recoil velocity of pistol?


take me answer

Answer 1

1=

Month of april = 30 days

therefore, total hours a day=24

So, total hours in the month of April = 30*10=300 hours

therefore total cost 300/2.50=120 rupees