Question

Rajeev is a student of class IX. After studying Work and energy chapter, he decided to find

electrical energy being consumed in his room. He was using a tubelight of 50 W for around 6

hours a day, a fan of 70 W for around 10 hours a day. Now answer the following questions. (3)

(i) His energy consumption (in kWh) for a month of 30 days is :

(a) 30 (b) 3000 (c) 1 (d) 30000

(ii) If cost of electricity is Rs.8 per unit, monthly expenditure for his room is :

(a) 240 (b) 30 (c) 2400 (d) None

(iii) The number of kilojoules in one kWh is

(a) 3.6 x 106

(b) 3.6 x 103

(c) 36000 (d) 106​

Answer 1

Answer:

this is soooooo longgggggggggggg

Answer 2

Answer:

I.b3000 ii.c.3600........