A) 100cm
B) 120cm
C) 125cm
D) 60cm
Correct Answer: B
Solution :
Area of 2 triangles \[=2\left[ \frac{1}{2}\times \text{base}\times \text{height} \right]\] = [base \[\times \] height] = [base \[\times \] base] \[(\because \,\,Base=Height)\] \[={{(base)}^{2}}\]. But area \[=225\Rightarrow \,{{(base)}^{2}}=225\] \[\Rightarrow \] base =15 cm Thus, side of square = 15 + 15 = 30 cm. \[\therefore \] Required perimeter = 4 (30) = 120 cm.You need to login to perform this action.
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