point b and c are on the opposite edges of a pond . find the length of the pond , a student of a class X makes a right triangle using a rope connecting a point b with anotther point a at a distance of 24 cm from it and connecting point c to a point at the distance of 60 cm from c and then connecting d to the point a , which is at the distance of 80 cm from it such that angle ADC = 90