(0 If the lengths of the sides of a triangle are in the ratio 3:4:5 and its perimeter is48 cm, find its area.(i) The sides of a triangular plot are in the ratio 3:5:7 and its perimeter is 300 m. Findits area. Take 3 1732

(0 If the lengths of the sides of a triangle are in the ratio 3:4:5 an

1.	(0 If the lengths of the sides of a triangle are in the ratio 3:4:5 and its perimeter is48 cm, find its area.(i) The sides of a triangular plot are in the ratio 3:5:7 and its perimeter is 300 m. Findits area. Take 3 1732
Answer» By using given ratio, sides of ∆can be written as 3x,4x and 5x As circumference is given, 3x+4x+5x=48➡ 12x= 48➡ x= 4So the sides are : 12cm, 16cm and 20cmBy using heron's formulai.e. √s(s-a)(s-b)(s-c)where, s is semi perimeter and a,b,c are sidesby putting values:-√24(24-12) 24(-16) 24(-20)√24×12×8×4√9216=96