Question

What is the value of x?

Answer 1

28

Explanation:

We use the concept of similarity to find the value of X.

Δ APR ≡ ΔCDR

∴ AR/CR = PR/DR

(10+x)/x = (15+42)/42

42(10+x) = 57x

420 + 42x = 57x

57x - 42x = 420

15x = 420

x = 420/15

= 28