Mathematics Question For RRB, Railway Group D, Rajasthan SI 31-07-2018

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Question(1) How many pellets of 4 cm diameter can be made by melting a concrete cone made of metal whose height is 10 cm and a radius of 20 cm of the base?

 धातु से बने एक ठोस शंकु जिसकी ऊँचाई 10 सेमी और आधार की त्रिज्या 20 सेमी है को पिघलाकर 4 सेमी व्यास की कितनी गोलियाँ बनाई जा सकती है ? 

(A) 134

(B) 123

(C) 125

(D) 121

Question(2) If 24 cm The volume of a circular cone with height is 1232 cm ^ 3 then its curved surface area is?

 यदि 24 सेमी. ऊँचाई वाले एक लम्ब वृत्तीय शंकु का आयतन 1232 सेमी.^3 है तो उसका वक्र पृष्ठीय क्षेत्रफल है ?

(A) 555 सेमी^2

(B) 550 सेमी^2

(C)455 सेमी^2

(D) 535सेमी^2

Question(3) The area of the base of a pyramid is 57 sq cm and height is 10 cm So its volume is in cm ^ 3?

 एक पिरामिंड़ के आधार का क्षेत्रफल 57 sq cm है और ऊँचाई 10 सेमी. है तो उसका आयतन सेमी^3 में है ?

(A) 190 सेमी^3

(B) 149 सेमी^3

(C) 147 सेमी^3

(D) 148 सेमी^3

Question(4) If the volume and dorsal area of a circle are equal in numerical form, then will it have an Arghance?

 यदि किसी गोले के आयतन और पृष्ठीय क्षेत्रफल संख्यात्मक रूप में समान है, तो उसका अर्ध्दव्यास होगा ?

(A) 5 इकाई

(B) 9 इकाई

(C) 4 इकाई

(D) 3 इकाई

Question(5) A copper wire whose length is 36 meters and diameter 2 mm. Is melted to a sphere is the arcade of the sphere?

एक ताँबे के तार जिसकी लम्बाई 36 मीटर तथा व्यास 2 मिमी. है को पिघलाकर एक गोला बनाया गया है गोले का अर्ध्दव्यास है ?

(A)4 सेमी

(B) 3 सेमी

(C)5 सेमी


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