Medium Mathematics Arithmetic Progressions (AP) Class 10 Level 70

एक सीढ़ी में सबसे नीचे (52) ईंटें हैं और हर ऊपर वाली पंक्ति में (4) ईंटें कम हैं। (10) पंक्तियों में कुल कितनी ईंटें होंगी?

A staircase has (52) bricks in the bottom row and (4) fewer bricks in each upper row. How many bricks are there in (10) rows?

Explanation opens after your attempt
Correct Answer

A. (340)

Step 1

Concept

This is the decreasing AP \(52,48,44,\ldots\) and \(S_{10}=340\). Exam tip: treat the decrease as a negative common difference.

Step 2

Why this answer is correct

The correct answer is A. (340). This is the decreasing AP \(52,48,44,\ldots\) and \(S_{10}=340\). Exam tip: treat the decrease as a negative common difference.

Step 3

Exam Tip

यह घटती समान्तर श्रेणी \(52,48,44,\ldots\) है और \(S_{10}=340\)। परीक्षा में कमी को ऋणात्मक सार्व अंतर मानें।

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Mathematics Answer, Explanation and Revision Hints

एक सीढ़ी में सबसे नीचे (52) ईंटें हैं और हर ऊपर वाली पंक्ति में (4) ईंटें कम हैं। (10) पंक्तियों में कुल कितनी ईंटें होंगी? / A staircase has (52) bricks in the bottom row and (4) fewer bricks in each upper row. How many bricks are there in (10) rows?

Correct Answer: A. (340). Explanation: यह घटती समान्तर श्रेणी \(52,48,44,\ldots\) है और \(S_{10}=340\)। परीक्षा में कमी को ऋणात्मक सार्व अंतर मानें। / This is the decreasing AP \(52,48,44,\ldots\) and \(S_{10}=340\). Exam tip: treat the decrease as a negative common difference.

Which concept should I revise for this Mathematics MCQ?

This is the decreasing AP \(52,48,44,\ldots\) and \(S_{10}=340\). Exam tip: treat the decrease as a negative common difference.

What exam hint can help solve this Mathematics question?

यह घटती समान्तर श्रेणी \(52,48,44,\ldots\) है और \(S_{10}=340\)। परीक्षा में कमी को ऋणात्मक सार्व अंतर मानें।

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