Question 21

The area and the length of one of the diagonals of a rhombus is 84 cm2 and 7 cm respectively. Find the length of its other diagonal (in cm).

Solution

Let length of one diagonal = $$d$$ cm and length of other diagonal = 7 cm

=> Area of rhombus = $$\frac{1}{2}\times d_1d_2$$

=> $$\frac{1}{2}\times7\times d=84$$

=> $$d=\frac{84\times2}{7}$$

=> $$d=24$$ cm

=> Ans - (B)

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