Question

in a rectangular solid l:b:h=4:3:2.if the total surface area is 1300cm^2 find the dimensions

Answer 1

let the dimensions be 4x, 3x, 2x

A/C to question

TSA=1300

2(lb+bh+lh)=1300

2(4x*3x + 3x*2x + 4x*2x)=1300

2(12x^2+6x^2+8x^2)=1300

2*26x^2=1300

52x^2=1300

x^2=1300/52

x^2=25

so, x=√25=5 cm

Therefore the dimensions are,

4x=4*5=20cm

3x=3*5=15cm

2x=2*5=10cm

Length=20cm

Breadth=15cm

Height=10cm

Hope it helps you :)

Answer 2

here is your answer

hope it helps u