# Mathematics Question For RRB, Railway Group D, Rajasthan SI 28-07-2018

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Question(1) 12 cm Three small shaped shells have been melted by melting a spherical lead of diameter, with a diameter of 3: 4: 5. Will be the radius of the smallest shells?

12 सेमी. व्यास वाले सीसे के एक गोले को पिघलाकर तीन छोटे आकार के गोले बनाए गए है, जिनके व्यासों का अनुपात 3:4:5 है | सबसे छोटे गोले की त्रिज्या होगी ?

(A)4 सेमी

(B) 7 सेमी

(C)6 सेमी

(D) 3 सेमी

Question(2) If the ratio of the two cones to the ratio is 2: 3 and the proportion of the radius of their bases is 1: 2, then what is the ratio of their heights?

यदि दो शंकुओं के आयतनों का अनुपात 2:3 है और उनके आधारों की त्रिज्याओं का अनुपात 1:2 हो, तो उनकी ऊँचाईयों का अनुपात क्या होगा ?

(A) 4:5

(B) 8:3

(C) 4:4

(D) 7:8

Question(3) A cylindrical iron rod, whose height is 4 times its arched space, has been molded in the Arctave balls of the molasses rod. A number of goals?

एक बेलनाकार लोहे की छ्ड़, जिसकी ऊँचाई उसके अर्ध्दव्यास की 4 गुनी है को पिघलाकार छ्ड़ के अर्ध्दव्यास वाले गोलों में ढाला गया है | गोलों की संख्या होगी ?

(A) 3

(B) 8

(C) 7

(D) 4

Question(4) 6 cm Melting a solid spherical ball of diameter to a diameter of 12 cm Is molded. Is the height of the cone?

6 सेमी. व्यास की धातु की एक ठोस गोलाकार गेंद को पिघलाकर एक शंकु के रूप में जिसके आधार पर व्यास 12 सेमीं. है ढाला जाता है | शंकु की ऊँचाई है ?

(A)6 सेमी

(B)9 सेमी

(C) 7 सेमी

(D)5 सेमी

Question(5) The volume of a cuboid is twice the volume of a cube. If the side of the cuboid is 9 cm 8 cm So what is the whole dorsal area of the cube?

एक घनाभ का आयतन एक घन के आयतन का दोगुना है | यदि घनाभ की भुजाऍ 9 सेमी. 8 सेमी. है तो घन का सम्पूर्ण पृष्ठीय क्षेत्रफल क़्य़ा है ?

(A)245 सेमी^2

(B) 218सेमी^2

(C)214सेमी^2

(D) 216 सेमी^2

All Solutions (1-5):

Que(1).Ans-(D)

Que(2).Ans-(B)

Que(3).Ans-(A)

Que(4).Ans-(C)

Que(5).Ans-(D)

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