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Class of 2025 (2025 HSC CHAT) (8 Viewers)

melanie_o

Academic Victim
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Dec 18, 2023
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SAME SO EXCITED ITS BITTERSWEET BUT THEN EVERY EMBARASSING THING IVE DONE FOR THE PAST 13 YEARS WONT MATTER ANYMORE
I'm going to ugly cry so hard omllllll I'm not ready. GIVE ME ONE MORE YEAR, EVEN A TERM!!!!!! 🥀 :cake:
 

kfsbdf

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May 11, 2024
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GUYS ANY1 GOT COMPANY FOR ANY 2025 PAPERS PLEASE DM ME OR MSG ME WILLING TO PAY CHEM AND EXT 1 and 2 MATH
 

ManicPixie

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also guys on my life i’m studying i just lowkey hate the ypt app so just ignore my zero hours of study…
 
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haminifhei

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HI GUYS!!!! update me with everything, how is it going with exams? here to help with tips!
 

C2H6O

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how tf do i do this shit

A master painter takes 4 hours to paint a wall and expects to be paid $45 per hour for his work. His apprentice takes 6 hours to paint the same sized wall and expects to be paid $20 per hour. How much will it cost to hire both the master painter and his apprentice to paint the wall together? 4 marks
theres more than 1 way to approach this question but the one id go with is

step 1, find both their respective speeds of painting per hour as a percentage of the wall per hour
for the master painter
in 1 hour he paints 1/4 of the wall, ie 25% per hour, at $45 per hour
for the apprentice
in 1 hour he paints 1/6 of the wall, ie 16.67% per hour, at $20 per hour

step 2 find their combined rate of work/cost
so in 1 hour of them both painting the wall, 25% + 16.67% = 41.67% of the wall painted per hour for $45 + $20 = $65 per hour
thus that is their combined rate of work

step 3 find the time they will take to finish the wall as a pair
to paint 100% of the wall it will take 100%/41.67% per hour = 2.4 hours

step 4 find the cost
thus the cost is 2.4 hours * $65 per hour = $156
 
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