An 82 cm long and 75 cm wide rectangle is enclosed by a strip outside it that is 4 cm wide. Find the area of the strip?
Maths / 100 Most Repeated MCQs of Math — Multiple-choice practice
- A. 1320 cm²
- B. 1280 cm²
- C. 1276 cm²
- D. None of these
Correct answer
1320 cm²
Explanation
Explanation To find the area of the strip: 1. Calculate the area of the larger rectangle (including the strip): New length = 82 + 2_4 = 90 cm New width = 75 + 2_4 = 83 cm Area of larger rectangle = 90 * 83 = 7470 cm² 2. Calculate the area of the original rectangle: Area = 82 * 75 = 6150 cm² 3. Find the area of the strip: Area of strip = Area of larger rectangle - Area of original rectangle = 7470 - 6150 = 1320 cm²
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