A) 52 cm
B) 58 cm
C) 99 cm
D) 81 cm
E) None of these
Correct Answer: A
Solution :
Explanation \[\operatorname{Area} = \frac{1}{2} \left( produce of diagonals \right)\] \[= \,\,\frac{1}{2} \times 24 \times 10 = 120 c{{m}^{2}}\] \[\operatorname{side}\,\,=\,\,\frac{1}{2}\,\,\sqrt{(sum\,\,of\,\,the\,\,square\,\,of\,\,diagonals)}\] \[=\,\,\,\frac{1}{2}\,\sqrt{(2{{4}^{2}}+1{{0}^{2}})}=\,\,\frac{\sqrt{676}}{2}\,=\frac{26}{2}=13cm\] Perimetre \[=\,\,\,4 \times 13 = 52 cm.\]
You need to login to perform this action.
You will be redirected in
3 sec
