Question

if a:b = 3:1 , and b:c = 5:1 then find the value of a²/15b²c​

Answer 1

Answer:

a : b = 3 : 1

b : c = 5 : 1

---------------------------

a : b : c = 15 : 5 : 1

(1)

\begin{gathered} \frac{ {a}^{3} }{15 {b}^{2}c } \\ = \frac{15 \times 15 \times 15}{15 \times 5 \times 5 \times 1} \\ = 9\end{gathered}

15b

2

c

a

3

=

15×5×5×1

15×15×15

=9

(2)

\begin{gathered} \frac{ {a}^{2} }{7bc} \\ = \frac{15 \times 15}{7 \times 5 \times 1} \\ = \frac{45}{7} \\ = 6.43\end{gathered}

7bc

a

2

=

7×5×1

15×15

=

7

45

=6.43