Question

Rohan doesn't know how many tennis balls he has. Sonia has $36$ tennis balls with her which are $6$ more than the tennis balls that Rohan has. How many tennis balls Rohan has?

• A. $42$
• B. $30$
• C. $216$
• D. $6$

Answer 1

The correct option is B $30$

$\underset{–}{ConceptInvolved:}$
'More' suggests that we need to add that amount to the reference amount.

$\underset{–}{Method:}$
Here, we are given that Sonia has $36$ tennis balls with her.
Also, Sonia has $6$ more tennis balls than Rohan.

Representing the given situation in the form of algebraic equations, we get

Number of tennis balls with Rohan(r) + $6$ tennis balls = Number of tennis balls with Sonia(s)
$r+6=s$
Here, $s=36$ (Since, Sonia has $36$ tennis balls with her)
$r+6=36$
$r+6-6=36-6$
$r=30$

Rohan has $30$ tennis balls with him.