Question

Tell me the answer of Q23 b part.plzzz

Answer 1

10cm length of the third side fall

Answer 2

a
$perimeter \: of \: rectangle \: \\ 2(x + y) \\ where \: diagonal \: is \: 41cm \\ then \: in \: right \: angled \: triangle \: we \: have \: \\ {hypotenuse}^{2} = {base}^{2} + {perpendicular}^{2} .....by \: pythagores \: theorem \\ then \: \\ here \: hypotenuse \: = 41 \: base \: \\ base \: = 40 \\ then \: perpedicular = \sqrt{ {(41)}^{2} - ( {40)}^{2} } \\ then \: breadth \: = 9 \\ 2(40 + 9) = 98cm$