Question

Area of rectangle =0.162meter²
l:b = 2:5
Increase in area =3.4 desimeter ²
find,
new length and
new breath (in mm)

Answer 1

l=0.08,b=0.2. ~~ when area is 0.162 to convert m^2 to dm^2 we have a relation that is Adm^2=100×Am^2. let's enter into the problem Adm^2 = 100×0.162=16.2m^2..,..........then l×b = 16.2 that is 2x × 5x=16.2 that implies to 10x=16.2 therefore x=16.2÷10 that is 1.62. therefore the length is 2x=2×1.62 =3.24. and breadth is 5x=5×1.62=8.1