Question

total surface area of cuboid is 300, length 5,breadth 20, height =?​

Answer 1

Answer:

The answer is height = 2

Step-by-step explanation:

We know that,

Total surface area of a cuboid with length $l$, breadth $b$

and height $h$ is $2(lb+bh+hl)$

Given, $l=5,b=20$ and Total surface area 300

$\Rightarrow 2(lb+bh+hl)=300\\\Rightarrow 2(5\times 20+20h+5h)=300\\\Rightarrow 2(100+25h)=300\\\Rightarrow 100+25h=150\\\Rightarrow 25h=150-100\\\Rightarrow 25h=50\\\Rightarrow h=\frac{50}{25}=2$