Math Is Fun Forum

Mariner

Member

Registered: 2010-06-16

Posts: 35

Distance problems

Hi, I was wondering what is the best way to solve these types of questions in your head. no use of calculator.
D=S x T

S=500km/h , Time= 2h 30min
S=72km/h, time= 5h 24min

Last edited by Mariner (2011-01-16 13:37:55)

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Distance problems

Hi Mariner,
If you are comfortable with usual multiplication, go ahead by converting mins to hrs, and multiply.
E.g. D = 72km/h * (5 + 24/60)h = 360 + 144/5 = 388.8km
Make sure about the units.
If you want a fast way, learn "Vedic mathematics".

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"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

soroban

Member

Registered: 2007-03-09

Posts: 452

Re: Distance problems

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