एक साइकिल चालक पहले घंटे (28) किलोमीटर चलता है और हर अगले घंटे (7) किलोमीटर अधिक चलता है। (15) घंटों में कुल दूरी कितनी होगी?
A cyclist covers (28) km in the first hour and (7) km more each next hour. What is the total distance in (15) hours?
Explanation opens after your attempt
D. (1155)
Concept
The distances form the AP \(28,35,42,\ldots\) and \(S_{15}=1155\). Exam tip: treat each hour's distance as one term.
Why this answer is correct
The correct answer is D. (1155). The distances form the AP \(28,35,42,\ldots\) and \(S_{15}=1155\). Exam tip: treat each hour's distance as one term.
Exam Tip
दूरी \(28,35,42,\ldots\) समान्तर श्रेणी है और \(S_{15}=1155\)। परीक्षा में प्रति घंटे की दूरी को एक पद मानें।
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