Cbse Open Text Based Assessment Worksheet - Class Ix - Board Of High School And Intermediate Education - 2015-2016 Page 27
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2815. For the consumption of x units, lies between 200 units and 400 units for a month as per
Chennai Tariff slabs shown in actual bill, form a linear equation in the total cost Rs. y
and total consumption x units. Find the total bill, if total consumption for the month is
380 units.
(4 marks)
16. Find the total amount of electric consumption of 325 units for a month as per tariff
given for Kolkata after forming a linear relationship between consumption and cost.
(3 marks)
17. Find the total amount of electric consumption of 325 units for a month as per tariff
given for Mumbai after forming a linear relationship between consumption and cost.
(3 marks)
18. Form linear equations to calculate electric bill for consumption of electricity units
between 200 units and 650 units for four metro cities given in last table.
(3 marks)
19. Form linear equations to calculate electric bill for consumption of electricity units
between 400 units and 800 units for different state utilities near Delhi NCR.
(3 marks)
20. Amit has two bedrooms flat in a city of Mumbai. He installed 6 fans, 7 tube lights. He
uses his refrigerator for 24 hours, electric iron for 30 minutes, Computer for 2 hours
and TV for 3 hours. He wishes that his monthly consumption of electricity should be
630 units per month. Establish a linear equation for the same assuming that he is using
all fans and tube lights for x hours and one air conditioner for y hours per day for a
month of 30 days, where AC take load of 1900 W.
(3 marks)
21. Form a linear equation to prepare an electricity bill for consumption of electric units
between 1000 and 1200 units as per tariff plan of some state given in the text in the
form of slabs for first 150 units, next 250 units and above 400 units. Also, find the total
cost, if consumption is 1050 units.
(3 marks)
22. Form a linear equation to prepare an electricity bill for consumption of electric units
between 800 and 900 units as per tariff plan of some state given in the text in the form
of slabs for first 100 units, next 200 units, next 200 units and above 500 units. Also,
prepare a bill for consumption is 840 units.
(3 marks)
23. As per BSES report, write in percent, how fuel prices have moved in Delhi?
(3 marks)
24. As per BSES report, write in percent, how services have moved in Delhi?
(3 marks)
25. In Delhi power tariff, eight hours load shedding per day impact is taken for NCR
towns. From 200 units of a house, if x units are used during shed hour, then form a
linear equation in total cost factor and units consumed. Also, find the total cost, if
consumption during shed hour is 50 units.
(3 marks)
Prepared by: M. S. KumarSwamy, TGT(Maths)
Page - iii -
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