Subject :IMO Class : Class 6
Two ants start at point A and walk at the same pace. One ant walks around a 3 cm by 3 cm square whilst the other walks around a 6 cm by 3 cm rectangle.
What is the minimum distance, in centimetres, any one must cover before they meet again?
A 18
B 36
C72
D 216
Their answer is wrong
Ans 1:
Class : Class 8
its 36
As the ant which walks around the square covers 12 cm in one round and the ant which walks around the rectangle covers 18 cm in one round.
To find out when they will meet you can take the LCM of the distance they cover in one round. it is 36 so they will meet after both the ants cover 36 cm.
Pravir
Ans 2:
Class : Class 10
Answer: B
We have corrected the answer. Thanks for pointing out.
Solution
Perimeter of small square = 12 cm
Perimeter of big square = 18 cm
LCM of 12 and 18 = 36
We have corrected the answer. Thanks for pointing out.
Solution
Perimeter of small square = 12 cm
Perimeter of big square = 18 cm
LCM of 12 and 18 = 36
Ans 3:
Class : Class 8
its 36
As the ant which walks around the square covers 12 cm in one round and the ant which walks around the rectangle covers 18 cm in one round.
To find out when they will meet you can take the LCM of the distance they cover in one round. it is 36 so they will meet after both the ants cover 36 cm.
Pravir