Question

The surface area of a cuboid is 120 as.m if the length and breadth of the cuboid are equal and the height is 2m find the length and breadth

Answer 1

Heyyy mate

here is your answer..

given, s.a of cuboid= 120m^²


2(lb+BH+lh) = 120m^²

let length and breadth= X m

so, according to question

2 ( x^2+2x+2x)= 120

x^2+4x= 120/2=60m^²

x^²+4x-60=0

x^²+(10-6)x-60

x^²+10x-6x-60

X(X+10)-6(X+10)

(X+10) (x-6)

X+10=0

X= -10

x-6= 0

X= 6

so length and breadth= 6m

hope it help you

Answer 2

Answer:

6m^2

Step-by-step explanation:

TSA=120m ^2

H= 2m                                               let l and b be = x

TSA= 2(lb+bh+lh)

120=2(x*x)+(2*x)+(2*x)                        2/120

60= x^2 +4x

x^2 +4X-60=0

=(X-6)(X+10)=0

ans=6m^2