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Find the number of terms in the series 2...

Find the number of terms in the series `20 ,19 1/3,18 2/3...` the sum of which is 300. Explain the answer.

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RD SHARMA ENGLISH-ARITHMETIC PROGRESSIONS-All Questions
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  2. Find the sum of first 20 terms of an A.P., in which 3r d terms in 7 an...

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  3. Find the number of terms in the series 20 ,19 1/3,18 2/3... the sum of...

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  4. The sums of n terms of three arithmetical progressions are S1, S2and ...

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  5. If in an A.P. the sum of m terms is equal of n and the sum of n ter...

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  6. The first , second and the last terms of an A.P. are a ,b , c respect...

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  7. If (3+5+7+ u p tont e r m s)/(5+8+11+ u p to10t e r m s)=7, then find...

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  8. In a factory, 150 workers were engaged to finish a piece of work in a ...

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  9. Prove that the sum of n arithmetic means between two numbers in n ti...

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  10. If a ,b ,c are in A.P., then prove that: (a – c)^2 = 4(b^2 – ac).

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  11. If a^2(b+c),b^2(c+a),c^2(a+b), are in A.P. show that either a ,b ,c ar...

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  12. If n arithemetic means are inserted between 20 and 80 such that the ra...

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  13. Along a road lie an odd number of stones placed at intervals of 10 met...

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  14. A carpenter was hired to build 192 window frames. The first day he mad...

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  15. In a potato race 20 potatoes are placed in a line at intervals of 4m e...

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  16. We know that the sum of the interior angles of a triangle is180^0 . S...

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  17. If S1 be the sum of (2n+1) term of an A.P. and S2 be the sum of its od...

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  18. Divide 32 into four parts which are in A.P. such that the product of ...

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  19. If theta1,theta2,theta3, ,thetan are in AP, whose common difference ...

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  20. If (m+1) term of an A.P. is twice the(n+1) th term, prove that (3m+1) ...

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