Answer:
Total cost of building the wall is Rs 79000.
Explanation:
Given:
Dimension of the wall = (20×15×0.1) m
Dimension of the bricks = (0.2×0.1×0.5) m
All measurements are in meters as we know,

We have to find the cost of building the wall.
Cost of the building the wall = Cost of bricks + Cost of labor.
Before that we have to find the number of bricks required.
So,
⇒
bricks.
⇒
Cost of all 3000 bricks :
⇒

Cost of 4 labors for 5 days at the cost of Rs 950 per day:
⇒

Total cost of building the wall:
⇒

Total cost of building the wall is Rs 79000.