Question

the outer dimension of the metal lid is 12 cm, 10 cm, 8 cm. if the whole surface area of its is 376 sq. cm then find the thickness of the of the metal sheet by which it is made.​

Answer 1

ANSWER ⏩

Internal length = (12-2)cm = 10cm

Internal breadth = (10-2)cm = 8cm

Internal height = (8-2)cm = 6cm

Inner surface area

= 2[10×8+8×6+10×6]

= (2×188) cm²

= 376cm²