How can this be solved?
ABCD is a rectangle with sides 36 and 90 cm. P is a point on BC , which is one of the longer sides, such that PA=2 PD. The length of PB is?
Find the digital sum of the number.
Details and Assumptions
Digital sum is the sum of the digits of the number E.g. the digital sum of the number 31 will be 3+1=4