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E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_09
\ 12-Sep-2024 Surender Prajapati Proof-5 Reader’s Sign _______________________ Date __________

maths fun
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.

1. Which is the shortest route around the rocks and back to the start of rock A?

Route I: A → B → C → F → E → D → A or START FINISH
A
Route II: A → D → C → B → E → F → A 5 m
4 m
2. The shortest route from rock A to F is ____ m long. B
6 m
F
3. The length of the route from rock A to rock C via the rock 4 m 8 m 6 m
B is ______ m long. 3 m
C E
4. What is the distance of the shortest route from the rock

D to C? _______
8 m D 5 m

Conversion

Metre into Centimetre

To convert metres into centimetres, we multiply the number of Note
metres by 100. On converting a bigger
unit (m) into the smaller
Example 1: My mother bought 4 m of cloth for making my kurta. unit (cm), we multiply by
100. 1 m = 100 cm
What is its length in cm?

Solution: 4 m = (4 × 100) cm = 400 cm

Metre and Centimetre into Centimetre

To convert metres and centimetres into centimetres, we multiply the number of metres

by 100 and add the product to the number of centimetres.

Example 2: I bought a silver foil pack of 16 m 72 cm. How much silver foil
did I buy in cm?

Solution: 16 m 72 cm = (16 × 100) cm + 72 cm = 1600 cm + 72 cm = 1672 cm

Centimetre into metre

To convert centimetres into metres and centimetres, we divide the number of metres
by 100.

Example 3: Convert 600 cm into m. 100 600 6 m
600
Solution: 600 cm = (600 ÷ 100) m = 6 m 0 cm

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