Similarity

On a map drawn to a scale of 1cm to 5km, the distance between two towns is 3.6 cm. What is the actual distance between the towns ?
1. 0.72 km
2. 3.6 km
3. 5 km
4. 18 km
The length of an aeroplane is 32 m. The length of a scale model is 24 cm.
If the wing span of the aeroplane is 50 m , how long is the wingspan of the model ?
1. 32 cm
2. 36 cm
3. 37.5 cm
4. 38 cm
A cube has its edge 3 times that of another cube.
What is the ratio of their volumes ?
1. 81 : 1
2. 27 : 1
3. 9 : 1
4. 3 : 1
A triangle has sides 4, 6 and 7 units.
Which of the following are similiar to this triangle ?
1. 5 , 7, 8
2. 20 , 30 , 36
3. 48 , 72 , 84
4. 9, 12 , 18
A tower is 25 m high and casts a shadow 45 m long.
What length of shadow does a 10 m high flagpole near the tower cast ?
1. 5.6 m
2. 10 m
3. 18 m
4. 22.5 m