Banner 0
Banner 1
Banner 2
Banner 3
Banner 4
Banner 5
Banner 6
Banner 7
Banner 8
Banner 9

Q.

A room has two tube lights, a fan and a TV. Each tube light draws 40 W, the fan draws 80 W and the TV draws 60 W. On the average, the tube lights are kept on for five hours, the fan for twelve hours and TV for eight hours every day. The rate for electrical energy is Rs. 3)10 per KWH. Calculate the cost of electricity used in this room in a 30 day month.

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya

a

Rs.17112

b

Rs.161

c

Rs.175

d

Rs.16112

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

Detailed Solution

The energy consumed by :
(i) Tube lights =2×10×5×30=12000Wh
(ii) Fan =1×80×12×30=28800Wh
(iii) TV =1×60×8×30=14400Wh
Total = 55200Wh
Total no of units = 55.2 kWh
Total cost = 55.2 x 3.10
=171.12

Watch 3-min video & get full concept clarity
score_test_img

courses

No courses found

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!

best study material, now at your finger tips!

  • promsvg

    live classes

  • promsvg

    progress tracking

  • promsvg

    24x7 mentored guidance

  • promsvg

    study plan analysis

download the app

gplay
mentor

Download the App

gplay
whats app icon
personalised 1:1 online tutoring