A 73kg workers need to transport concrete bricks using a trolley to the construction area via an elevator. The trolley weighs 100kg while 5 concrete bricks weigh 330kg. If the elevator has a maximum capacity of 1500kg, how many bricks can the worker transport at one time?

20 20bricks

20 To find out how many bricks the worker can transport at one time, we need to calculate the total weight of the worker, trolley, and bricks, and then compare it to the maximum capacity of the elevator.

First, let's calculate the total weight of the worker, which is 73kg.

Next, let's add the weight of the trolley, which is 100kg.

The combined weight of the worker and trolley is 73kg + 100kg = 173kg.

Now, let's add the weight of the concrete bricks. Five bricks weigh 330kg.

So, the total weight of the worker, trolley, and bricks is 173kg + 330kg = 503kg.

Finally, we compare the total weight to the maximum capacity of the elevator, which is 1500kg.

Since the total weight is 503kg and the maximum capacity is 1500kg, the worker can transport the bricks as long as the total weight does not exceed the maximum capacity.

Therefore, the worker can transport a maximum of 1500kg - 503kg = 997kg of additional weight.

Now, let's calculate how many bricks can be transported by dividing the additional weight capacity by the weight of each brick.

Each brick weighs 330kg, so dividing the additional weight capacity of 997kg by 330kg gives us approximately 3.

Therefore, the worker can transport 3 concrete bricks in addition to themselves and the trolley, for a total of 3 + 1 (worker) + 1 (trolley) = 5 bricks.

On the elevator you would have:

the worker + the trolley + the bricks
= 73 + 100 + x = 1500
x = 1327
So we can have 1327 kg of bricks
each brick weight 330/5 or 66 kbg

number of those = 1327/66 = 20.1

so we could take 20 bricks at a time