Question

The volume of cuboid is 1280m cube its breath and hieght are in ratio 5:4 and lenght is 16 m find the total surface area

Answer 1

let common ratio be x
breadth = 5x
height = 4x
volume of cuboid = l×b×h
1280 = 5x×4x×16
x^2=1280/360
x= 8
breadth=5×8=40m
height= 4×8=32m
TSA=2(lb+bh+lh)
=2(16×40 + 40×32+16×32)m

Answer 2

Hey !!
Check the attachment.
Hope it helps :)