11. (a) एक त्रिभुज की दो भुजाएँ 15 m और 20 m हैं तथा त्रिभुज की परिमिति 60 m है।
त्रिभुज का क्षेत्रफल ज्ञात कीजिए।

300m

After doing google translation, I got this-  

11. (a) The two sides of a triangle are 15 m and 20 m and the perimeter of the triangle is 60 m.

Find the area of the triangle.

15*20=300

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

what? ?

what type of question is thiss

step-by-step explanation: