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Two sides of a triangle are 8 m and 5 m ...

Two sides of a triangle are 8 m and 5 m in length. The angle between them is increasing at the rate 0.08 rad/s. When the angle between the sides of fixed length is `(pi)/(3)`, the rate at which the area of the triangle is increasing, is a)`0.4 m^(2)//s` b)`0.8 m^(2)//s`c)`0.6 m^(2)//s`d)`0.04 m^(2)//s`

A

`0.4 m^(2)//s`

B

`0.8 m^(2)//s`

C

`0.6 m^(2)//s`

D

`0.04 m^(2)//s`

Text Solution

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The correct Answer is:
B
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