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Question
A magazine charges Rs 300 per 10 sq cm area for advertising. A company decided to order a half page advertisment. If each page of the magazine is 15 cm × 24 cm, what amount will the company has to pay for it?
Solution
Given, charges for 10 sq cm advertisement = ₹ 300
∴ Charges for 1 sq cm advertisement = `(₹ 300)/(10 "sq cm") xx 1` sq cm = ₹ 30
In order to find out the amount the company has to pay for a half page advertisement, we will find the area of half page of magazine and then multiply it with the charges for 1 sq cm advertisement.
Now, area of 1 page of magazine = 15 cm × 24 cm = 360 cm2
∴ Area of a half page of magazine = `("Area of" 1 "page of magazine")/2`
= `360/2` = 180 cm2
So, charges for half page advertisement = Area of half page of magazine × Charges for 1 sq cm advertisement
= 180 × 30
= ₹ 5400
Hence, the company has to pay ₹ 5400 for it.
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