Question

Q7. The side of a rectangle are in the ratio 5:4. If its perimeter is 72 CM then find the the length
of rectangle​

Answer 1

Respuesta:

20

Explicación paso a paso:

$\frac{x}{y} = \frac{5}{4} \\ 2(x + y) = 72$

$x + y = 36 \\ y = \frac{4}{5} x$

$x + \frac{4}{5} x = 36 \\ \frac{9}{5} x = 36 \\ x = 20$

If x=20, then

$y = \frac{4}{5} \times 20 = 16$