If \(\sqrt{10}\)= 3.162, then \(\sqrt{4 0}\) = ?
A) 6.324
B) 9.486
C) 12.648
D) 31.62
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Express the following as cm using decimals. (a) 2 mm (b) 30 mm (c) 116 mm (d) 4 cm 2 mm (e) 162 mm (f) 83 mm
Correct Answer - (a) 0.2 सेमी`" "`(b) 3.0 सेमी `" "` (c )11.6 सेमी `" "` (d) 11.6 सेमी (e) 16.2 सेमी `" "(f) 8.3 सेमी
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If a convex mirror is held in air and then dipped in oil, then what will be the change in its focal length?
Focal length of spherical mirrors are independent of the medium.
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Find the common difference of an A.P if \( t_{18}-t_{14}=3 L \). If \( 3+k, 18-k, 5 k+1 \) are in A.P, then find \( k \). If \( p \) and \( q \) are positive integers, then we write \( p=a^{2} b^{3} \) and \( q=a^{3} b \) if \( a \), \( b \) are numbers, then verify that L.C.M of \( (p, q) \times \) H.C.F of \( (p, q)=p q \).
t18=t1+17×d t14=t1 +13×d solving the two equtaions, t18-t14= 4d subtisting 4d=32 = d=8
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If √10 = 3.162, then √40 = ?
Correct option is (A) 6.324 \(\because\) \(\sqrt{10}\) = 3.162 \(\therefore\) \(\sqrt{40}=\sqrt{4\times10}\) \(=2\sqrt{10}=2\times3.162\) = 6.324
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If √10 = 3.162, then the value of 1/√10 is
Correct option is (C) 0.3162 \(\because\) \(\sqrt{10}=3.162\) \(\therefore\) \(\frac1{\sqrt{10}}=\frac{\sqrt{10}}{\sqrt{10}\times\sqrt{10}}=\frac{\sqrt{10}}{10}\) \(=\frac{3.162}{10}=0.3162\)
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If √10 = 3.162, then the value of 1/√10 is
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In Two right angle triangles their hypotenuse AB, EF are equal and AC = DE then then which of the following is not true?
Correct option is (A) ΔABC ≅ ΔDEF In \(\triangle ABC\;and\;\triangle EFD,\) AB = EF (Both hypotenuse are equal) \(\angle C=\angle D\) \(=90^\circ\) (Angles opposite to hypotenuse) AC = ED (Given) \(\therefore\) \(\triangle ABC\cong\triangle EFD\) ...
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In Two right angle triangles their hypotenuse AB, EF are equal and AC = DE then then which of the following is not true?
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If n is odd, then an + bn is divisible by (a + b) and an− bn is divisible by (a − b). If n is even, then an− bn is divisible by (a − b) and (a + b) .
12011 + 22011 + 32011 +...... +20102011 = (12011 + 20102011) + (22011 + 20092011) + (32011 + 20082011) ...... (10112011 + 10002011) These terms are of the form an + bn, so they will be divided by a + b, as n...
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One person sold a radio at 10% profit then he gets Rs. 748 then the C.P of that radio was …………………..
Correct option is (D) ₹ 680 Let cost price of radio be Rs x. \(\therefore\) Selling price = x + 10% of x = x + \(\frac{10x}{100}\) = x + \(\frac{x}{10}\) \(=\frac{11x}{10}.\) Given that selling price = Rs 748 \(\therefore\) \(\frac{11x}{10}=748\) \(\Rightarrow\) \(x=\frac{748}{11}\times10=680\) \(\therefore\) Cost price...
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