Possibly d, but I’m not sure, hope this helps ;)
Answer:
Density of steel = 80.73 gm/
Step-by-step explanation:
The figure is made up of cuboid and square pyramid.
Height of cuboid, h = 9 cm
Length of cuboid, l = 6 cm
Width of cuboid, w = 6 cm
Volume of cuboid is given by the formula:


Density of Wood ,
= 0.68g/
We know that formula of Density is:


Putting the values:

Total weight = 
970 = 220.32 
= 749.68 gm
Volume of pyramid is given as:

Base is a square with side 6 cm

Density of Steel/Pyramid:

In a 90 45 45 triangle, the 2 legs each have a
length = hypotenuse / square root of 2
length = 16 / square root of 2
length =
16 / <span>
<span>
<span>
1.4142135624
</span>
</span></span>
<span><span><span>length =
11.313708499
</span>
</span>
</span>