(1/10 + 1/15)^(-1) = 30/5 = 6 minutes

I don't understand

What is the rate of printing of machine A? how many worksheets per minute?

What is the rate of printing of machine B? how many worksheets per minute?

What is the rate of printing when both machines are working together? how many worksheets per minute?

1 set per 15 mins .

so how many sets per minute?

0.1

huh??

1 set per 15 minutes eh

25 mins for 2 sets

6mins

0.07

0.08

.... How did you get those numbers.....

We need to print 1 set of worksheets so we need to find out what fraction of a set is printed by both machines. Machine A prints 1/10 of a set per min. Machine B prints 1/15 of a set per min. So, what is the the amount printed in 1 min? 1/10 + 1/15 = 5/30 = 1/6 of a set. 1/6 of a set takes 1 min, then we can find how many minutes for 1 whole set.

Ok so 0.08 set per minute..... So how many minutes for 1 set?

12.5

X/10 + X/15 = X/6

Hi, Grace Ong. First, find the total cost of the 3 boxes. Second, find the total cost of the 12 boxes. Those two steps will help you find the total cost of 15 boxes. :)

Thank u:)

C+M+W=4u+2u+1u=7u(when model is drawn). 1u=26957/7=3851. 4u=3851*4=15 404

Ratio of men, women to children is as follows. 1:2:4 :)

Ali has 6u stamps. Bernard will hv 18 u stamps. (3 times more than Ali) Ali gives 2u (1/3 of 6u) and Bernard gives 9u (1/2 of 18u) to Charlie. Now Charlie has doubled his stamps. So 11u plus original = 308. 11u = 308/2 = 154 U = 14. So altogether, 6u + 18u + 154 = 24u + 154 = 336+154 = 490 Corrected when winson siew spotted a mistake.

Ali to Bernad=1:3 after charlie received 1/3 of ali stamp and 1/2 of bernads stamp he had his stamps x2 became 308 1:3=3:9=6:18 C received 11u from A+B so remainder of A:B=4:16 308-11u=154 11u=154 1u=14 14x24+154=490 Check:if 1u = 14 A=14x6=84 A=14x18=252 C=154 84 x 3=28 252/2=126 126+28+154=308

the 2nd part is check Wong Suei Qi

wait how is dis possible i dont understand how ans can be 462 S Ching Ching

S Ching Ching i think theres something wrong with the answer sheet, check with your teach cuz if 462 were the total 462-308=154 154/4=38.5 not possible stamps cant be in .5

S Ching Ching can check with your teach i'm curious to see if theres a mistake

Answer is 490... Answer sheet is wrong

Following Robert Yeo working Ali->6u Bernard-> 18u Charlie-> 11u Total-.> 35u-> 35x14= 490(answer)

Izam Marwasi he just got calculation error

Err .... Izam Marwasi Bernard 18u ..... not 8 u .... ;)

Robert Yeo...typo...total is 35u(6+18+11)x14->490

Yes just a typo .....

erm Robert Yeo 14x24=336 NOT 264 i assume you mental sum'd this ?

336 + 154 = 490. Thanks Winson Siew

Robert Yeo the answer is not 490

the guy said answer sheet said 462

I believe my own answer. ;)

i think something wrong with answer sheet

Wong Suei Qi i do not believe 462 is the ans

it is not possible for stamps to be .5

k cna

can*

you know there can be typo errors right

shuttup and stop spamming

k whutever

I agree. :)

Answer 490 Answer sheet is wrong

ah someone has brought some enlightenment