Step-by-step explanation:

BC=10cm

h

1

=5cm,h

2

=7cm

Area of Quadrilateral=area $$(\triangle ABC)+area (△BCD)

=

2

1

×BC×h

1

+

2

1

×BC×h

2

=(

2

1

×10×5+

2

1

×10×7)cm

2

=(25+35)cm

2

=60cm

2

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