allery$16$ আৰু $25$-ৰ মাজৰ মধ্য সমানুপাতী নিৰ্ণয় কৰক।
A$18$
B$20$
C$22$
D$24$
Answer & Solution
Correct answer: B. $20$
মধ্য সমানুপাতী $= \sqrt{a \times b} = \sqrt{16 \times 25} = \sqrt{400} = 20$.
Option A (18) হ'ল সমান্তৰিক মাধ্য $(16+25)/2 \approx 20.5$-ক তললৈ পূৰ্ণসংখ্যা কৰা মান — ওচৰা-উচৰি, কিন্তু বিচৰা গুণোত্তৰ মাধ্য নহয়।
Keep practising Ratio and Proportion
Browse all Ratio and Proportion questions for RRB NTPC, or explore more Quantitative Reasoning topics.
Related questions
₹$5400$ is divided among A, B and C in the ratio $3 : 5 : 7$. How much does B receive?Find the compounded ratio of $(2 : 3)$, $(5 : 7)$ and $(4 : 9)$.If $\dfrac{a}{b} = \dfrac{3}{5}$, find the value of $\dfrac{a+b}{a-b}$.Find the fourth proportional to $4$, $9$ and $12$.Which of the following is equivalent to the ratio $4 : 5$?