Math, asked by NavjotJassi, 1 day ago

Vineet wants to polish the floor of a room which is 140 cm long and 120 cm wide . The charges for polishing the floor is 52 per square metre . What will be the cost of polishing the floor of the room ?



I need the answer of this question urgently please answer.

Answers

Answered by pcplionelmessi
6

Answer:

Length=140cm

breadth=120cm

Area=(140*120)cm2

=16800cm2

= 1.68m2

Cost of polishing floor = 1.68*52

=Rs.87.36

Answered by crankybirds31
2

Step-by-step explanation:

"Given details are, Length of room = 12 m

Let width of room be ‘b’ m

Let height of room be ‘h’ metre Now,

Area of floor = 12×b m2 = 12b m2

Cost of matting the floor at the rate of 85 paise per square metre = Rs 91.80 12b × 0.85 = 91.80

12b = 91.80/0.85

12b = 108 b = 108/12

= 9m

Now, Breadth of room = 9m

Area of 4 walls = 2 (l×h + b×h)

= 2 (12×h + 9×h)

= 2 (12h + 9h)

= 2 (21h)

= 42h m2

Cost for preparing walls at the rate of Rs 1.35 per square metre = Rs 340.20 42h × 1.35 = 340.20

42h = 340.20/1.35

42h = 252 h = 252/42

= 6m

∴ Height of room is 6m. "

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