Jonny cut a plank of wood so that it is 50% shorter. It is now 42cm long. How long was the plank of wood before Jonny cut it?

asked Nov 21, 2022 47.4k views

2 votes

Jonny cut a plank of wood so that it is 50% shorter.

It is now 42cm long.

How long was the plank of wood before Jonny cut it?

by Brub

7.7k points

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7 votes

$42 \: cm * 2 = 84 \: cm$

The plank of wood was 84 cm bejore Jonny cut it.

Proof:

$84 * 0.50 = 42 \: cm$

Syed answered Nov 25, 2022