The grandfather clock was too tall for the shelf, so it stood on the floor by the door.

1. What percentage of the floor space did the grandfather clock occupy if it measured 25 cm wide x 25 cm long and the floor was 5 m x 5 m ?

2. The grandfather clock chimed once every 15 minutes. How often is that in 24 hours ?

3. Work out the face of the grandfather clock if it measured 15 cm across the diameter.

4. The grandfather clock’s pendulum was 3 / 5 ths the size of the height of the clock. If the grandfather clock was 2 m high, how long was the pendulum ?

5. Work out the volume of the grandfather clock if it measured 2 m high x 50 cm wide x 30 cm deep.

6. The grandfather clock was wound up every day for 3 minutes – how long did my Grandfather spend winding up the clock in one week ?

7. The time on the grandfather clock read 8 o’ clock in the morning. What time did it read after 5 hours ?

© Jacqueline Richards 2007

Answers :

1. (25 x 25 = 625) / (500 x 500 = 250, 000) = 0.0025 = 0.25%

2. 24 x 4 = 96

3. 3.14 x 7.5 x 7.5 = 176.625 sq cm

4. 200 / 5 x 3 = 120 cm

5. 200 x 50 x 30 = 300 , 000 cubic cm

6. 3 x 7 = 21 mins

7. 1 p.m.

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