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Raju Sahu

· started a discussion

· 1 Months ago

4403 written in ques intead of 6403

Question:

DIRECTIONS: What approximate value will come in place of the question mark?


\(\sqrt{4901}\) x 35.93 + ? = \(\sqrt{6403}\)  x 490.08 + 3246

Options:
A) 25200 
B) 41920
C) 38000
D) 49925
E) 39930
Solution:
Ans: (e) 

\(\sqrt{4901}\rightarrow \sqrt{4900}\ = 70\)

35.93 \(\rightarrow\) 36

 \(\sqrt{6403}\rightarrow \sqrt{6400} \)    = 80

490.08 \(\rightarrow\) 490

3246 \(\rightarrow\) 3250 \(\Rightarrow\) 70 x 36 + ? = 80 x 490 + 3250

39200 + 3250 - 2520 \(\approx\) 39930

kanhaiya jha

· commented

· 1 Months ago

Hi, Take approximate values and solve....a typing error occurred...it has been corrected....




Sol:

4901 = 4900

√(4900) =70

35.93 = 36

6403 = 6400

√ˆš(6400)= 80

490.08 = 490

3246 =†’ 3250

Now,

√(4901) x 35.93 + ? = √ˆš(6403) x 490.08 + 3246

70 x 36 + ? = 80 x 490 + 3250
? = 39200 + 3250 - 2520 =‰ˆ 39930

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