Question

Area of a rectangle having length $10cm$ and breadth $50mm$ respectively will be :

• A. $15c{m}^2$
• B. $50c{m}^2$
• C. $100c{m}^2$
• D. $500c{m}^2$

Answer 1

The correct option is B $50c{m}^2$

Given:
Length of the rectangle, $l=10cm$
Breadth of the rectangle, $b=50mm$ By unit conversions, $10mm=1cm$
$⟹b=\frac{50mm}{10mm}\times 1cm$
$b=5cm$

Area of rectangle is given as the product of length and breadth.
$A=lb$
$A=10cm\times 5cm$
$A=50c{m}^2$