If p is the third proportional to 8,20 and q is the fourth proportional to 3, 5, 24, then find the value of (2p + q).
Answer & explanation
Correct answer: option 1
Using direct formula,
Third proportional of A and B = \(\frac{B\; \times\;B}{A}\)
p = \(\frac{20\; \times\; 20}{8}\)
= 50
q = \(\frac{5\; \times\; 24}{3}\)
= 40
2p + q = 100 + 40 = 140