Home
Class 12
PHYSICS
Radha's house is fitted with 2 lamps of ...

Radha's house is fitted with 2 lamps of 60W each and 2 fans consuming 0.4A each . If energy is upplied at 200V and coats Rs. 2.50 per kWh. Find the monthly bill if all the appliances run for 10 hours a day.

Text Solution

Verified by Experts

Power of 2 lamps=`60xx2=120W`
Power of 2 fans `=2xxVxxt=2xx200xx0.4=1 60W`
Total power `=120+160=280W`
Energy consumed during 30 days `=(280xx10xx30)/(1000)=84` kWh
Total cost =`84xx2.5= 210`
Promotional Banner

Similar Questions

Explore conceptually related problems

A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled carboard. Each cone has a base diameter of 40 cm and height 1 m. If the outer side of each of the cones is to be painted and the cost of painting is Rs. 12 per m^(2) , what will be the cost of painting all these cones ? (Use pi=3.14 and take sqrt(1.04)=1.02 )

A JEE aspirant estimates that she will be successful with an 80 percent chance if she studies 10 hours per day, with a 60 percent chance if she studies 7 hours per day and with 40 percent chance if she studies 4 hours per day. She further believes that she will study 10 hours, 7 hours and 4 hours per day with probabilities 0.1, 0.2 and 0.7 respectively. The chance she will be successful, is

A battery of emf 2.0 V and internal resistance 0.10 Omega is being charged with a current of 5.0 A . Find the potential difference between the terminals of the battery?

A battery of emf 2.0 V and internal resistance 0.10 Omega is being charged with a current of 5.0 A . Find the potential difference between the terminals of the battery?

A JEE aspirant estimates that she will be successful with an 80 percent chance if she studies 10 hours per day, with a 60 percent chance if she studies 7 hours per day and with 40 percent chance if she studies 4 hours per day. She further believes that she will study 10 hours, 7 hours and 4 hours per day with probabilities 0.1, 0.2 and 0.7 respectively. Given that she is successful, What is the chance that she studies for 4 hrs?

The length, breadth and height of a hall are 16 m, 10 m and 6 m respectively. It has two doors measuring 2 m times 1.5 m each and four windows measuring 2 m times 2 m each. Find the cost of white washing all the four walls and the ceiling of the hall at the rate of Rs. 5 per m^(2) .

A cottage industry manufactures pedestal lamps and wooden shades, each requiring the use of a grinding/cutting machine and a sprayer. It takes 2 hours on grinding/cutting machine and 3 hours on the sprayer to manufacture a pedestal lamp. It takes 1 hour on the grinding/cutting machine and 2 hours on the sprayer to manufacture a shade. On any day, the sprayer is available for at the most 20 hours and the grinding/cutting machine for at the most 12 hours. The profit from the sale of a lamp is Rs. 5 and that from a shade is Rs. 3. Assuming that the manufacturer can sell all the lamps and shades that he produces, how should he schedule his daily production in order to maximise his profit ?

The circuit in figure shows two cells connected in opposition to each other. Cell E_(1) is of emf 6 V and nternal resistance 2 Omega the cell E_(2) is of emf 4 V and internal resistance 8 Omega . Find the potential difference between the points A and B.

A man owns a field of area 1000 sq.m. He wants to plant fruit trees in it. He has a sum of Rs. 1400 to purchase young trees. He has the choice of two types of trees. Type A requires 10 sq.m. of ground per tree and costs Rs. 20 per tree and type B requires 20 sq.m. of ground per tree and costs Rs. 25 per tree. When fully grown type A produces an average of 20 kg. of fruit which can be sold at a profit of Rs. 2/ - per kg and type B produces an average of 40 kg of fruit which can be sold at a profit of Rs. 1.50/ - per kg. How many of each type should be planted to achieve maximum profit when the trees are fully grown ?

Represent the folloowing situations in the form of quadratic equations : (1) The length of the hypotenus of an isosceles right angled triangle is 10 cm. We need to find the length of each of two equal sides. (2)The sum of squares of two consecutive odd positive integers in 970. We need to find those integers. (3) While selling an article for Rs. 96, the profit in percentage is equal to its cost price in rupees. We need to find the cost price of the article. (4) When there is a decreases of 10 km/h in the usual speed of a train, it takes 4(1)/(2) hours more to cover 900km. We need to find the usual speed of the train. (5) The sum of squares of two parts of 31 is 481. We need to find those two parts.