A motorboat covers the distance from one pier to the other pier in 4 hours and the way back in 5 hours. What is the speed of the boat in still water, if it covers 70 km with the current in 3.5 hours?
lol i hate russian math
speed of boat in still water ---- x km/h
speed of current ------ y km/h
distance with the current = 4(x+y)
distance against the current = 5(x-y)
we know that 3.5(x+y) = 70
x+y = 20
but 4(x+y) = 4(20) = 80
then 5(x-y) = 80
x-y = 16
x+y=20
x-y=16
add them
2x = 36
x = 18 , then y = 2
state the conclusion
BAHAHA NOT EVERYONE HERE BC OF RSM-
lol rsm is kinda lowkey trash ngl
18
why is everyone that goes to rsm toxic except for like 3 kids, and two of those three are the class tryhards that no one likes
imagine paying attention in rsm-
rsm is so trash
Omg ahhh I suck at rsm it takes me a whole our to figure out half of a problem I’m so dumb so here I am searching up answers 😭
rsm is honestly tiring, and really annoying, and really hard to pay attention during
but idk its good in the long run ?