Question

If the cost of 7 m cloth is Rs 714, then the cost of 21 m of cloth is Rs 2142.

• A. Rs 2142
• B. Rs 5432

Answer 1

The correct option is A

Rs 2142

Given,

Cost of 7 m cloth = Rs 714
Using the unitary method in which first we find the value of one unit and then the value of the required number of units.
Cost of 1 m cloth = $Rs\frac{714}{7}$ = Rs 102
$\therefore$ Cost of 21 m cloth = $Rs102\times 21$ = Rs 2142
Therefore, the cost of 21 m cloth is Rs 2142.

Hence, the given statement is true.