CGL 21 Tier 2 Maths


Question 1

Three years ago, Raman’s salary was ₹45000. His salary is increased by 10 percent, A percent and 20 percent in first, second and third year respectively. Raman’s present salary is ₹83160. What is the value of A? 

तीन वर्ष पहले रमन का वेतन ₹45000 था। उसके वेतन में पहले, दूसरे तथा तीसरे वर्ष में क्रमशः 10 प्रतिशत, A प्रतिशत तथा 20 प्रतिशत की वृद्धि की गई है। रमन की वर्तमान आय ₹8360 है। A का मान क्या है?


Options

A

54

54

B

50

50

C

30

30

D

40

40


Solution:

Correct Answer:

D

40

40


Raman’s salary three years ago  = 45000

Raman’s present salary = 83160

45000 ×\times 110100\frac{110}{100} ×\times 100+A100\frac{100 + A}{100} ×\times 120100\frac{120}{100} = 83160

100 + A = 83160 × 1045× 11× 12\frac{83160 \times 10 }{45 \times 11 \times 12}

100 + A = 140

A = 40 %

तीन वर्ष पहले रमन का वेतन  = 45000

रमन की वर्तमान आय = 83160

45000 ×\times 110100\frac{110}{100} ×\times 100+A100\frac{100 + A}{100} ×\times 120100\frac{120}{100} = 83160

100 + A = 83160 × 1045× 11× 12\frac{83160 \times 10 }{45 \times 11 \times 12}

100 + A = 140

A = 40 %

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