Question

Solve the proportion. 10/a = 15/30 a. 2 b. 20 c. 5 d. 10

Answer 1

The answer is B. a= 20.

Answer 2

Answer: The correct option is

(b) 20.

Step-by-step explanation: We are given to solve the following proportion :

`(10)/(a)=(15)/(30)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)`

We will be solving the given proportion by the method of cross-multiplication.

From (i), we have

`(10)/(a)=(15)/(30)\\\\\\\Rightarrow (10)/(a)=(1)/(2)\\\\\\\Rightarrow a=2*10\\\\\Rightarrow a=20.`

Thus, the required solution is a = 20.

Option (b) is CORRECT.