Question

find the cost of painting cube at Rs. 9.50 per m square whose edge is 5m

Answer 1

we have to find cost of painting on cube .
rate of painting on cube is 9.5 Rs./m²
edge length of cube is 5m

we know,
total surface area of cube = 6 × (edge length)²
= 6 × (5)²
= 6 × 25
= 150m²

now, cost of painting on cube = rate of painting × total surface area of cube
= 9.5 × 150
= 1425 Rs.

Answer 2

Solution :

Given edge of the cube( a ) = 5m²

Area of the cube painted

= Total Surface Area of the cube

= 6a²

= 6 × 5²

= 6 × 25

= 150 m²

Now ,

cost of 1 m² painting the cube = Rs9.50

cost of painting the cube = 150×9.50

= Rs 1425

••••