Find the value of:
$2 a + 4 b + 5 c, when a = 5, b = 10 a n d c = 20$

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Solution

Find the value of $2 a + 4 b + 5 c$ .

On substituting $a = 5, b = 10 a n d c = 20$ is
$2 a + 4 b + 5 c,$ we get:

$2 a + 4 b + 5 c = 2 (5) + 4 (10) + 5 (20)$
$= 10 + 40 + 100$
$= 150$

Therefore the value of $2 a + 4 b + 5 c$ is $150.$

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If $2160 = 2^{a} . 3^{b} . 5^{c}$ , find a, b and c. Hence calculate the value of $3^{a} \times 2^{- b} \times 5^{- c}$

2 a + 4 b + 5 c

a = 5, b = 10

c = 20.

2 a + 4 b + 5 c

a = 5, b = 10

c = 20.

2 a + 4 b + 5 c, w h e n a = 5, b = 10, c = 20

Find the value of: $2 a + 4 b + 5 c$ $w h e n a = 5, b = 10, c = 20$

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