Question

18. किसी आयताकार हॉल की लम्बाई 20 मी० और चौड़ाई 9 मी० है। इसके फर्श को 1 मी०
5 डेसीमी० चौड़ी लम्बी दरी से ढंकना है। यदि दरी का मूल्य 12 रु० प्रति मीटर हो, तो
फर्श को ढंकने का कुल खर्च निकालें।​

Answer 1

Answer:

2160 Rupees

Step-by-step explanation:

First we have to find the area of hall = Length × Breadth

20m × 9m

180m sq.

So, to find the values we must change the units of length. So that it will be easier of us.

1m = 10dm

180m sq. = 18000dm sq.

and also

1m 5dm = 10dm + 5dm

15dm

So we have to check how many carpets we need?

1800dm/15dm

120

So we need 120 carpets and the length of 120 carpet will be:

120×15dm

1800dm

To check the price:

1m = 10dm

1800dm = 180m

Cost of 1m carpet is 12 Rs.

12×180

2160 Rs

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