Mathematics Question For RRB, Railway Group D, Rajasthan SI 25-07-2018

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Question(1) A pipe of metal is 21 cm long and its outer diameter is 8 cm. If the thickness of the pipe is 1 cm and the weight of the metal is 8 gm/cm ^ 3 then the load of the pipe?

 धातु की एक पाइप 21 सेमी लम्बी है और उसका बाहरी व्यास 8 सेमी है | यदि पाइप की मोटाई 1 सेमी है और धातु का भार 8 gm/cm^3 तो पाइप का भार है ?

(A) 3.699 किग्रा

(B) 3.055किग्रा

(C)4.565 किग्रा

(D)3.556 किग्रा

Question(2) A-holes 15 meters long and 12 meters wide. If the sum of the floor and roof area of that hail equals the area of its four walls, then how many cubic meters of volume will that volume be?

 एक हाँल 15 मीटर लम्बा और 12 मीटर चौड़ा है | यदि उस हाँल के फर्श तथा छत के क्षेत्रफलों का योग उसकी चारों दीवारों के क्षेत्रफलों के बराबर हो तो उस हाँल का आयतन कितने घन मीटर होंगा ?

(A) 1100

(B) 1500

(C) 1200

(D) 1375

Question(3) Let A and B be two concrete spheres, and the surface area of B is 300% more than the surface area of A. The volume of A is found to be k% less than the volume of B. Will the value of k?

 माना कि A और B दो ठोस गोलक है और B का पृष्ठ क्षेत्रफल A के पृष्ठ क्षेत्रफल से 300 % अधिक है | A का आयतन B के आयतन से k% कम पाया गया है | k का मान होगा ?


(B) 87.5%

(C) 89.2%


Question(4) Three small shells have been melted by melting a metal shell of 12 cm radius. If the radius of two small balls is 6 cm and 8 cm then what is the radius of the third sphere?

 12 सेमी त्रिज्या वाला एक धातु का गोला पिघलाकर तीन छोटे गोले बनाए गए है | उनमें यदि दो छोटे गोलों की त्रिज्याएं 6 सेमी तथा 8 सेमी हों तो तीसरे गोले की त्रिज्या कितनी होगी ? 

(A) 12 सेमी

(B)16 सेमी

(C)13 सेमी

(D) 10 सेमी

Question(5) If the measure of each brick is 25 cm * 11.25 cm * 6 cm, then how many bricks will be required for a wall of 6 meters high and 22.5 cm thick?

 यदि प्रत्येक ईट का माप 25 सेमी.* 11.25 सेमी.* 6 सेमी हो, तो 8 मीटर लम्बी 6 मीटर ऊंची तथा 22.5 सेमी मोटी एक दीवार के लिए कितनी ईटों की आवश्यकता पड़गी ? 

(A) 6400

(B) 6500

(C) 2100

(D) 5100

All Solutions (1-5):







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