Question
(a) How many right angles are there in a cubical room?
(b) What should be subtracted from (512+32) to get 2?
[3 MARKS]
(b) What should be subtracted from (512+32) to get 2?
[3 MARKS]
Answer:
:
(a) Answer: 1 Mark
(b) Steps: 1 Mark
Result: 1 Mark
(a) Each corner has three mutually perpendicular edges, hence forming three right angles in each corner. A room has 8 corners. Hence, there are 24 right angles in the room.
(b) Let the number to be subtracted be x.
⇒512+32−x=2
⇒5+1812−x=2
⇒2312−x=2
⇒x=2312−2
⇒x=23−2412
⇒x=−112
⇒x=−112
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:
(a) Answer: 1 Mark
(b) Steps: 1 Mark
Result: 1 Mark
(a) Each corner has three mutually perpendicular edges, hence forming three right angles in each corner. A room has 8 corners. Hence, there are 24 right angles in the room.
(b) Let the number to be subtracted be x.
⇒512+32−x=2
⇒5+1812−x=2
⇒2312−x=2
⇒x=2312−2
⇒x=23−2412
⇒x=−112
⇒x=−112
Was this answer helpful ?
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