How high up is the ladder
A ladder 10 meters long is placed against a wall with its foot 6 meters from the base of the wall. How high does the ladder reach up the wall?
A box of biscuits
A box of biscuits contains 36 biscuits. 20 biscuits have foil wrappers. 15 are chocolate biscuits with foil wrappers. If 9 are not chocolate and do not have a foil wrapper, then how many chocolate biscuits are there?
We can use the Pythagorus Theorem for this and we get:
ReplyDelete10^2 = 6^2+x^2
100=x^2+36
x^2=64
x=8