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Q.

Two light strings of length 4 cm and 3 cm are tied to a bob of weight 500 gm. The free ends of the strings are tied to pegs in the same horizontal line and separated by 5 cm. The ratio of tension in the longer string to that in the shorter string is

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a

4:3

b

3:4

c

4:5

d

5:4

answer is B.

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Detailed Solution

Since 32 + 42 = 52, The angle between the strings must be 900, as shown in the figure. cosθ1 = 4/5, cosθ2 = 3/5By Lami's Theorem,

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