Question

a cuboid has total surface area of 50 cm square and lateral surface area are 30 cm square find the base of the cuboid​

Answer 1

Answer:

T.S.A. of cuboid= 2(lb+by+lh)

50cm sq= 2(lb+bh+lh)

50cm sq /2 = lb+bh+lh

25 cm = lb+bh+lh. eq (1)

L.S.A. of cuboid= 2 ( l+b) h

30 cm sq = 2( l+b) h

15 cm = lh+bh

put the value of lh+bh in eq 1

25 cm = lb + 15 cm

lb = 10cm

area of base = l*b

= 10