Question

A tin box of length 9m breadth 2m height 50cm is made without lid . Find total area of its faces ?

Answer 1

According to question

Length of box       L = 9 m
Breadth of box      B = 2 m
Height of box        H  = 50 Cm = 0.5 m

total area =  2 (LB + BH + LH) - L * B
                =  2 (9*2 + 2*0.5 + 9*0.5) - 9 * 2
                =  2 (18 + 1 + 4.5) - 18
                =  2 ( 23.5 ) - 18
                =  47 - 18
                 = 29 

Answer 2

SOLUTION:
Given:

Length of box( L)= 9 m
Breadth of box(B )= 2 m
Height of box(H) = 50 cm = 0.5 m
[1cm=1/100m]
Total area = 2 (LB + BH + LH) - L× B
[Without lid]
Total area = 2 (9×2 + 2×0.5 + 9×0.5) - 9 ×2
= 2 (18 + 1 + 4.5) - 18
= 2 ( 23.5 ) - 18
= 47 - 18
= 29 m²
Hence, the total area of the tin box is 29 m². HOPE THIS WILL HELP YOU...