What is the reciprocal of 312 -

The correct option is B 27 312=3+12 #160; #160; #160; #160; #160; #160; =6+12 #160; #160; #160; #160; #160; #160; ...

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Byju's Answer

Standard VIII

Mathematics

Addition and Subtraction of Rational Numbers

What is the r...

Question

What is the reciprocal of $3 \frac{1}{2}$ ?

\frac{7}{2}

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\frac{2}{7}

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1 \frac{2}{3}

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none of these

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Solution

The correct option is B $\frac{2}{7}$
$3 \frac{1}{2} = 3 + \frac{1}{2}$

$= \frac{6 + 1}{2}$

$= \frac{7}{2}$
The reciprocal of $3 \frac{1}{2}$ i.e of $\frac{7}{2}$ is $\frac{1}{\frac{7}{2}}$
i.e. $1 \times \frac{2}{7} = \frac{2}{7}$
Option $B$ is correct.

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Similar questions

Q. (a) Which of these is a rational number between 2 and 3:

\frac{18}{27}, \frac{7}{3}, \frac{10}{3}, \frac{5}{2}

(b) Find one rational number that lies between

\frac{7}{8}

and

\frac{1}{2}

. What is its reciprocal?

[3 MARKS]

Evaluate :

$(i) \frac{3}{7} + \frac{- 4}{9} + \frac{- 11}{7} + \frac{7}{9} (i i) \frac{2}{3} + \frac{- 4}{5} + \frac{1}{3} + \frac{2}{5} (i i i) \frac{4}{7} + 0 + \frac{- 8}{9} + \frac{- 13}{7} + \frac{17}{9} (i v) \frac{3}{8} + \frac{- 5}{12} + \frac{3}{7} + \frac{3}{12} + \frac{- 5}{8} + \frac{- 2}{7}$

The numerically greatest term in the expansion of $(2 + 3 x)^{12}$ when $x = \frac{5}{6}$ is:

Q. What is/are the correct step(s) to solve the following equation?

2 x + 7 = 12 - 3 x

Evaluate $\int \sqrt{1 + y^{2}} .2 y d y$

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What is the reciprocal of 312 ?

The correct option is B 27312=3+12 =6+12 =72The reciprocal of 312i.e of 72 is 172i.e.1×27=27Option B is correct.

What is the reciprocal of $3 \frac{1}{2}$ ?

The correct option is B $\frac{2}{7}$
$3 \frac{1}{2} = 3 + \frac{1}{2}$

$= \frac{6 + 1}{2}$

$= \frac{7}{2}$
The reciprocal of $3 \frac{1}{2}$ i.e of $\frac{7}{2}$ is $\frac{1}{\frac{7}{2}}$
i.e. $1 \times \frac{2}{7} = \frac{2}{7}$
Option $B$ is correct.