Question

I am confused in a question that appeared in NEET of 2013 & 2016. Please users help me solve this question.

The question says:

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--A block of mass 30kg is suspended by three strings as shown in the figure. Find tension of each string.--
(figure = attachment)
$\sf sin37^ \circ \: = \frac{3}{5}$
$\sf cos37^ \circ \: = \frac{4}{5}$
$\sf tan37^ \circ \: = \frac{3}{4}$
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Answer 1

Answer:

Method I: Considering equilibrium of each part of system <br> The whole system is in equilibrium, therefore, for each part

. From the free body diagram of block C,

. <br> width="80%"><br> Now consider the equilibrium of point O, <br>

<br>

...(i) <br> and

...(ii) <br>

<br> From EQ.(i), we get <br>

. <br> Method II: Using therom width="80%"> <br> By, we have <br>

<br> But

<br> and