The daily work forms the AP \(68,82,96,\ldots\) and \(S_{17}=3060\). Exam tip: treat the daily increase as the common difference.
Step 2
Why this answer is correct
The correct answer is B. (3060). The daily work forms the AP \(68,82,96,\ldots\) and \(S_{17}=3060\). Exam tip: treat the daily increase as the common difference.
Step 3
Exam Tip
दैनिक काम \(68,82,96,\ldots\) समान्तर श्रेणी है और \(S_{17}=3060\)। परीक्षा में दैनिक वृद्धि को सार्व अंतर मानें।
The daily work forms the AP \(75,88,101,\ldots\) and \(S_{16}=2760\). Exam tip: treat the daily increase as the common difference.
Step 2
Why this answer is correct
The correct answer is C. (2760). The daily work forms the AP \(75,88,101,\ldots\) and \(S_{16}=2760\). Exam tip: treat the daily increase as the common difference.
Step 3
Exam Tip
दैनिक काम \(75,88,101,\ldots\) समान्तर श्रेणी है और \(S_{16}=2760\)। परीक्षा में दैनिक वृद्धि को सार्व अंतर मानें।
The daily work forms the AP \(55,64,73,\ldots\) and \(S_{18}=2367\). Exam tip: treat the daily increase as the common difference.
Step 2
Why this answer is correct
The correct answer is C. (2367). The daily work forms the AP \(55,64,73,\ldots\) and \(S_{18}=2367\). Exam tip: treat the daily increase as the common difference.
Step 3
Exam Tip
दैनिक काम \(55,64,73,\ldots\) समान्तर श्रेणी है और \(S_{18}=2367\)। परीक्षा में दैनिक वृद्धि को सार्व अंतर मानें।
The daily work forms the AP \(40,48,56,\ldots\) and \(S_{20}=2320\). Exam tip: treat the daily increase as the common difference.
Step 2
Why this answer is correct
The correct answer is C. (2320). The daily work forms the AP \(40,48,56,\ldots\) and \(S_{20}=2320\). Exam tip: treat the daily increase as the common difference.
Step 3
Exam Tip
दैनिक काम \(40,48,56,\ldots\) समान्तर श्रेणी है और \(S_{20}=2320\)। परीक्षा में दैनिक वृद्धि को सार्व अंतर मानें।
The eighteenth row has (229) bricks, so the total is (S_{18}=\frac{18}{2}(25+229)=2286). In word problems, convert the pattern into an arithmetic progression.
Step 2
Why this answer is correct
The correct answer is D. (2286). The eighteenth row has (229) bricks, so the total is (S_{18}=\frac{18}{2}(25+229)=2286). In word problems, convert the pattern into an arithmetic progression.
Step 3
Exam Tip
अठारहवीं पंक्ति में (229) ईंटें हैं, इसलिए कुल (S_{18}=\frac{18}{2}(25+229)=2286) है। शब्द-प्रश्न में क्रम को समांतर श्रेणी में बदलें।
The eighteenth row has (143) bricks, so the total is (S_{18}=\frac{18}{2}(24+143)=1503). In word problems, treat rows as terms.
Step 2
Why this answer is correct
The correct answer is D. (1503). The eighteenth row has (143) bricks, so the total is (S_{18}=\frac{18}{2}(24+143)=1503). In word problems, treat rows as terms.
Step 3
Exam Tip
अठारहवीं पंक्ति में (143) ईंटें हैं, इसलिए कुल (S_{18}=\frac{18}{2}(24+143)=1503) है। शब्द-प्रश्न में पंक्तियों को पद मानें।