Page 157 - Touchpad Mathematics_Ver1.0_C4

2. find the length of the following items.

a. b.

c. d.

e.

3. Anil and Sunil are having a race to see who can run the quickest around a set of
6 rocks. each boy has to touch each rock but can choose which route to take. the
routes are not of the same length. the boys start

and finish the race at Rock A.
a. Which is the shortest route around the rocks
and back to the start rock A?
Route i: A → B → C → F → E → D → A

Or
Route ii: A → D → C → B → E → F → A

b. The shortest route from rock A to rock F is
_________ m.
c. The length of the route from rock A to rock C via
rock B is _________ m.

d. What is the length of the shortest route from
rock D to rock C? _________

21 st
Century #Subject Enrichment
CoNveRSioN Skills

The following relationships help us convert one unit of length into another.

1 metre = 100 centimetres or 1 m = 100 cm × 1000 × 100 × 10
1 kilometre = 1000 metres or 1 km = 1000 m km m cm mm

Metres into Centimetres ÷ 1000 ÷ 100 ÷ 10

To convert metres into centimetres, multiply the number of metres by 100.

examples: a. 4 m = (4 × 100) cm = 400 cm
b. 17 m = (17 × 100) cm = 1700 cm

155
Measurement of Length