Question

The product of two numbers is 3.92. If one of them is 1.40, then the other number is ____.

• A. 2.4
• B. 1.44
• C. 2.8
• D. 3.2

Answer 1

The correct option is C

2.8

Let the other number be $x$.

1.40 $\times$ $x$ = 3.92

$\Rightarrow$ $x$ = 3.92 $÷$ 1.4

$\Rightarrow$ $x$ = 39.2 $÷$ 14
(On multiplying both numerator and denominator by 10)
$\Rightarrow$ $x$ = 392 $÷$ 140
$\Rightarrow$ $x$ = 2.8

$\therefore$ The other number is 2.8.