Question

The length of a cuboid is four times its height and breadth is 8cm. Find
the total surface area, if its volume is 800cm3.​

Answer 1

Answer:

let height (h)= x

length(l)=4x

breadth(b)=8

volume of cuboid =800

l × b × h = 800

4x × 8 × x = 800

32x^2=800

x^2. =800/32

x^2=25

x =5

therefore height = 5

length=20

total surface area =2(l×b×h)

=2(20×8×5)

=2(800)

=1600

Answer 2

Answer:

600

EXPLANATION : 8× 4x × x =800cm^3

4x^2 = 800/8

4x^2 = 100

x^2 = 100/4

x = √25

x= 5

length = 4×5 =20

TSA =2(lb+bh+hl)

= 2( 160 + 40 + 100 )

= 600