Directions: Study the given information carefully to answer the questions.
 
Sidhartha has decided to start a new company ‘Sidhartha Travels’. He wants to buy some furniture – table, chair, air-conditioners. He also wants to buy a few desktops which will include monitor, CPU, keyboard and mouse and the cost of each table is 13.5 times the cost of a mouse and the cost of chair is 3/5 of the cost of a table. The cost of an air conditioner is 5 times the cost of a chair. The cost of a monitor is 20% more than the cost of a chair, A CPU costs Rs. 1500 more than a table and the keyboard costs 4 times a mouse. The cost of a mouse is Rs. 1000.
Important for :
1
What will be the total cost of 1 table and 2 chairs together?
» Explain it
C
Cost of a mouse is ₹ 1000.

Cost of a keyboard = ₹ 1000 × 4 = ₹ 4000

Cost of a table = ₹ 1000 × 13.5 = ₹13500

Cost of a chair =  3  × 13500 = ₹ 8100
5

  Cost of 2 chairs = 8100 × 2 = 16200

Cost of 1 table + 2 chairs = 13500 + 16200 = ₹ 29,700.
2
What is the ratio of the cost of a CPU to the total cost of a mouse and a keyboard together?
» Explain it
C
Cost of a mouse is ₹ 1000.

Cost of a keyboard = ₹ 1000 × 4 = ₹ 4000

Cost of a table = ₹ 1000 × 13.5 = ₹ 13500

Cost of a CPU = 13500 + 1500 = ₹ 15000.

Reqd ratio =  Cost of a CPU
Cost of a (Mouse + Keyboard)

=   15000  =  15000  = 3 : 1
1000 + 4000 5000

3
If the cost of a keyboard and a mouse increases by 20% and 15% respectively, what will be the total cost of a desktop (given that the cost of a CPU and a monitor is the same)?
» Explain it
D
Cost of a mouse is ₹ 1000.

Cost of a keyboard = ₹ 1000 × 4 = ₹ 4000

Cost of a table = ₹ 1000 × 13.5 = ₹ 13500

Cost of a chair =  3  × 13500 = ₹ 8100
5
 
Cost of a monitor =  8100 × 120  = ₹ 9720
100

Cost of a keyboard after 20% increament = 4000 ×  120  = ₹ 4800
100

Cost of a mouse after 15% increament = 1000 ×  115  = ₹ 1150
100

∴    Cost of a desktop = Cost of (Monitor + CPU + Keyboard + Mouse)

= 9720 + 15000 + 4800 + 1150 = ₹ 30670.
4
Sidhartha bought 1 table, 1 chair and 1 desktop for himself. What was the total cost incurred to him?
» Explain it
E
Cost of a mouse is ₹ 1000.

Cost of a keyboard = ₹ 1000 × 4 = ₹ 4000

Cost of a table = ₹ 1000 × 13.5 = ₹ 13500

Cost of a chair =  3  × 13500 = ₹ 8100
5

Cost of a monitor =  8100 × 120  = ₹ 9720
100

Cost of a CPU = 13500 + 1500 = 15000

Total cost = 13500 + 8100 + 1000 + 4000 + 9720 + 15000 = ₹ 51320
5
It was initially decided that 4 air conditioners will be installed but later only 3 air conditioners and a fan were installed. If the cost of a fan is 1/10 of the cost of an air conditioner, what was the total cost incurred?
» Explain it
C
Cost of a mouse is ₹ 1000.

Cost of a table = ₹ 1000 × 13.5 = ₹ 13500

Cost of a chair =  3  × 13500 = ₹ 8100
5

Cost of an air conditioner = 5 × 8100 = ₹ 40500

Cost of a fan = 40500 ×  1  = 4050
10

Now, cost of 3 air conditioners + 1 fan = 3 × 40500 + 4050 = 121500 + 4050 = ₹ 125550.