Question

a sheet 2.5dem long and 1.4dem wise,is made by melting a copper rid having area of cross section 7sq.cm and 6dem long,what is the thickness of sheet?​

Answer 1

Answer:

1.2 cm

Step-by-step explanation:

Volume of copper rim=area of cross section × length

= 7×60 (∵ 1decimeter = 10 cm)

= 420 cm³

Let the thickness of the sheet be h

∴ Volume of sheet = volume of copper rim

25 × 14 × h = 420

∴ h = 420/(25 × 14)

h = 1.2 cm