A scale diagram of a room is drawn using a scale of 1:50 The length of the room on the scale drawing is 20 cm.
a How long is the actual room?
Give your answer in metres.

because the scale is 1:200,the real life measurement will be 200times larger the length of the room in real life must be 3 *200cm =600cm or6cm

the answer is 200

step-by-step explanation:

the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.

the simple interest for 2 years is $264; the simple interest for 1 year is $132.

$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.

the value of $200 at 22% interest compounded annually for three years is

200%281.22%29%5e3

the amount of interest is that value, minus the original $200.