Question

3) Find the diagonal of a rectangle whose length is 16 cm and area is 192 sq. cm.this is questions fig number
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Answer 1

Answer:

area =l×b=192

since l=16

, b=A/16=192/16=12cm

now diagonal =sq root (l^2+b^2)

=sq root (16^2+12^2)

=sq root(256+144)

diagonal = sq root 400=20cm