Question

The dimension of an oil tin are 26 cm×26cm×45cm. Find the area of the tin sheet required for making 20 such tins. If 1 sq m of the tin sheet costs ₹ 10, find the cost of tin used for these 20 tins.

Answer 1

Given,
Length = 26cm
breadth = 26cm
Height = 45 cm
Therefore total surface area = 2(lb+bh+hl)
T.S.A = 2(26*26 + 26*45 + 45*26)
T.S.A = 2(676 + 1170 + 1170)
T.S.A = 6032 cm2
Therefore area of 20 such tins is = 6032 * 20
= 120640cm2
In meters = 12.064 m2
Therefore cost of 20 tins = 12.064 * 10 = Rs.120.64