42/5 of 110/x = 840, find the value of x.

Correct option is B

Given
​$$\frac{42}{5} \times \frac{110}{x} = 840$$​​

Solution
Simplify the left side:
​$$42 \times \frac{110}{5} = 42 \times 22 = 924\\\ \\So, \frac{924}{x} = 840\\\ \\x = \frac{924}{840}$$​​

Simplify the fraction:

​$$x = \frac{924 \div 84}{840 \div 84} = \frac{11}{10}$$​​

Final Answer
So the correct answer is (b)