Question

in a figure (I) given below, ABC is an equalateral triangle with each side of length 10cm. In triangle BCD, Angle D = 90° and CD= 6cm. Find the area of shaded region​

Answer 1

Answer:

Let present age of Robert be 'x' then age of Roberts father = 4x ______ (1)

and after 5 years.

Roberts age = x+5 Roberts father age = 3(x+5)

then 4x+5=3(x+5)

4x+5=3x+15

[x=10]

present age of Robert is 10 years & age of Roberts father is 40 years.