alleryजर a : b = 2 : 3 आणि b : c = 4 : 5 असेल, तर a : c बरोबर:
A2 : 5
B3 : 4
C8 : 15
D5 : 8
Answer & Solution
Correct answer: C. 8 : 15
1. दोन्ही गुणोत्तरांमध्ये b चे मूल्य समान असल्याशिवाय त्यांना एकत्र जोडता येत नाही.
2. पहिल्या गुणोत्तरात b हा 3 आहे आणि दुसऱ्यामध्ये b हा 4 आहे, म्हणून प्रत्येकाला त्यांच्या LCM, 12 च्या प्रमाणात सममूल्य करा.
3. पहिल्या गुणोत्तराला 4 ने गुणा: a : b = 8 : 12.
4. दुसऱ्या गुणोत्तराला 3 ने गुणा: b : c = 12 : 15.
5. आता a : b : c = 8 : 12 : 15, म्हणून a : c = 8 : 15. b जुळवून न घेता बाहेरील पदांचा गुणाकार केल्याने 2 : 5 हे उत्तर येते.
_Source: syllabus Maths, Ch 7 'Comparing Quantities', S7.1 Recalling Ratios and Percentages_
Keep practising Ratio and Proportion
Browse all Ratio and Proportion questions for RRB NTPC, or explore more Quantitative Aptitude topics.
Related questions
If the ratio of boys to the whole class is 3 : 8, the ratio of boys to girls isA 40 kg mixture has A, B, C, D in the ratio 5 : 9 : 4 : 2. The amount of B isA screen has a 4 : 3 aspect ratio and is 32 cm wide. Its height isIn metrology, a ratio is a dimensionless quotient of two quantities measured inBoys are 3/8 of a class and number 60. How many girls are there?A ratio is 7 : 13. The first term is what percent of the total of both terms?The ratio 3 : 5 expressed as a percentage means the first is what percent of the second?If 3 : x = 12 : 20, then x is