Question

Side of a cube is 5 cm, what is the cost of painting, its outer surface at the rate of

₹10 per sq.m ?​

Answer 1

Answer:

1500₹

Step-by-step explanation:

Given:

Side of a cube(a) = 5cm

Cost of painting = 10₹ per sq.cm.

Solution:

Total Surface Area of a cube = 6a²

Substituting the value of 'a' in the expression- 6a², we get 6(5)²

6(5)² = 6(25)

6cm × 25cm = 150 cm²

Cost of painting it's outer surface = 150cm² × 10₹

= 1500₹

Therefore, cost of painting it's outer surface= 1500₹

Answer 2

Answer:

given side of a cube=5cm

LSA of cube= 4a²

= 4×(5)²

= 4×25

= 100

rate of painting 1 m²= ₹10

cost = area × rate

= 100×10

= ₹1000