Question

if a is directly proportional to b,a=40 b=8 then k =​

Answer 1

Answer:

k=5

Step-by-step explanation:

a is directly proportional to b,

so a=kb (k is a constant)

After substituting the values,

a=k x b

40= k x 8

k=40/8

k=5

Answer 2

SOLUTION

GIVEN

a is directly proportional to b , a = 40 , b = 8

TO DETERMINE

The value of k

EVALUATION

Here it is given that

a is directly proportional to b

⇒ a ∝ b

⇒ a = kb where k is constant

Now it is given that a = 40 , b = 8

$\displaystyle \sf{ \implies 40 = 8 \times k}$

$\displaystyle \sf{ \implies k = \frac{40}{8} }$

$\displaystyle \sf{ \implies k = 5 }$

FINAL ANSWER

Hence the required value of k = 5

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