Answer:

Step-by-step explanation:
Given



Required
Determine the invested amount
First, we need to determine the Principal
This is calculated as:

Solve for Principal




Add the principal to the interest



Your total price would be 159 because when you multiply the 150 by 6% you get 9 then add that to your 150 which is 159.
Without accurate calculations i would say 50
cuboid=3*3*5 [i.e l*b*h]
LCM of 3,5=15
i.e 15cm is the dimension of the final cube.
therefore cuboid required across length=15/3=5
similarly, across breadth=15/3=5
similarly, across height=15/5=3
Therefore total no of cuboid=5*5*3=75