The sides of a rectangle are 5 cm and 10 cm.
The sides are then increased by 50% each.

The answer is 125 but I don't understand how to work it out. Thanks!

Question

The sides of a rectangle are 5 cm and 10 cm.
The sides are then increased by 50% each.

The answer is 125 but I don't understand how to work it out. Thanks!

ganeshie8 · Answer

im getting 112.5 ?

mathslover · Answer

What do you need to do here?

parthkohli · Answer

area

mathslover · Answer

Oh.. I see. 

If the sides are increased by 50% each

Then , the new sides will be : 3l/2 * 3b/2 = 9(lb)/4 

9/4 * 50 = 9 * 25/2 = 112.5

mathslover · Answer

112.5 seems correct to me too.

anonymous · Answer

50% is half so the sides'd end up being 7.5 & 15
7.5 x 15
= 112.5

parthkohli · Answer

i still am not sure why the correct answer is 125

parthkohli · Answer

perhaps because we didn't interpret the question correctly

mathslover · Answer

Modern day mathematics.

miracrown · Answer

Trueeeee

parthkohli · Answer

lol, that too
@Zealous

miracrown · Answer

@ParthKohli it takes time to adjust to such things

parthkohli · Answer

huehue

mathslover · Answer

Why do books provide wrong answers?

parthkohli · Answer

i'm 300% sure this isn't a book
and that it is an online class

mathslover · Answer

lol... I appreciate your confidence.

parthkohli · Answer

ok, I'll reduce that down to 200%.  i may even be wrong.

mathslover · Answer

Naah... reduce that to 199%

miracrown · Answer

you can't rely on anything in these ''modern days''! 
So every time you do something, make sure you check it at least more than once.

anonymous · Answer

I got 112.5 too, relieved I'm not alone! I did it like 10x and got the same answer so I got @_@.  Thanks so much for the help guys, I'll report to my maths teacher. Yup, this is from a online maths class. 100% agree...."modern day maths".