Question

A block of wood floats 2/3 of its volume submerged; its relative density is equal to:
1. 1/3
2. 2/3
3. 4/3
4. 1/9
Plz Solve, Those who give answer just for point will be reported(no wrong answers).​

Answer 1

Answer:

Given

a

2

=13 and a

5

=25

We know that

a

n

=a+(n−1)d

∴a

2

=a+(2−1)d

⇒13=a+(2−1)d

⇒a+d=13 ...(i)

and a

5

=a+(5−1)d

⇒25=a+4d

⇒a+4d=25 ...(ii)

Now, subtracting (i) from (ii), we get

3d=12

⇒d=4

Now a+d=13 [from (i)]

⇒a=9

Hence, a

7

=a+6d=9+6(4)

⇒a

7

=33

Explanation:

Answer 2

A block of wood floats in water with 2/3 of its volume submerged it means 1 / 3rd of it's volume is above in the water.

★ᴘʟᴇᴀsᴇ ᴍᴀʀᴋ ᴀs ʙʀᴀɪɴʟɪᴇsᴛ ᴀɴsᴡᴇʀ ᴀɴᴅ ғᴏʟʟᴏᴡ ᴍᴇ!!