ise waqt brooch is in the shape as shown in the figure it involves 4 parallelogram to a which are of one size and other two are of others as if the base and height is bigger parallelogram are 2.5 cm and one centimetre and that of smaller parallelogram are 1.5 cm and 0.7 cm find the cost of polishing it at the rate of rs 50 per cent square
Answers
Answered by
0
ANSWER
Consider AB=51cm, BC=37cm and AC=20cm.
In ΔABC,
s=
2
a+b+c
=
2
51+37+20
=54
The area of ΔABC is,
A=
s(s−a)(s−b)(s−c)
=
54(54−51)(54−37)(54−20)
=
54(3)(17)(34)
=
93636
=306cm
2
The area of parallelogram is the twice of ΔABC,
A=2×306
A=612cm
2
Similar questions