Bryn is drawing a scale diagram of a building.
For every 10 m of the building he draws a line 5 cm long.
Bryn thinks he is using a ratio of 2 : 1. Alun thinks Bryn is using a ratio of 200: 1.
Is either of them correct? Explain your answer.
Answers
Answered by
1
Answer:
Correct option is A)
For the given statement first draw a diagram,
In this diagram, we can observe that
Height (h
1
) of each conical part =2 cm
Height (h
2
) of cylindrical part 12−2−2=8 cm
Radius (r) of cylindrical part = Radius of conical part =
2
3
cm
Volume of air present in the model = Volume of cylinder + 2× Volume of a cone
=πr
2
h
2
+2×πr
2
h
1
=π(
2
3
)
2
×8+2×
3
1
π(
2
3
)
2
(2)
=π×
4
9
×8+
3
2
π×
4
9
×2
=18π+3π=21π
=21×
7
22
=66 cm
2
Step-by-step explanation:
mark me as a brainliest
Similar questions