Question

62. What is the expenditure to paint a cubical box, of volume 729 cm, from
outside at the rate of 2.5 per cm??
(2) *1822.50
(1) 1215
(3) 2025
(4) 31512​

Answer 1

Answer:

1822.5

Step-by-step explanation:

1 cm^3 = Rs.2.5

729cm^3 = 729 x 2.5

=1822.5

Answer 2

Answer:

1) 1215

Step-by-step explanation:

Volume of cube = l^3 = 729 cm^3

$l \: = { \sqrt[3]{729} }$

l = 9 cm

TSA of cube = 6l^2

= 6 (9)^2

= 6 × 81

= 486 cm^2

☆ 1 cm^2 costs = 2.5 rs.

☆486 cm^2 = 486 × 25/10

= 1215 rs.

hope it helps