Question

The area of triangle is equal to the area of a rectangle whose length and breadth are $20cm$ and $15cm$ respectively. Calculate the height of the triangle if its base measures $30cm$.

• A. $20cm$.
• B. $30cm$.
• C. $40cm$.
• D. None of these

Answer 1

The correct option is A $20cm$.

The length of rectangle $=20cm$

The breadth of rectangle $=15cm$

The area of rectangle $=l\times b$

$\Rightarrow$ $=20cm\times 15cm=300c{m}^2$

The area of triangle $=300c{m}^2$

The base of triangle is $=30cm$

By given,

$\frac{1}{2}\times 30\times h=300⟹h=20cm$

The height of triangle $=20cm$.