Answer:
B maybe
Step-by-step explanation:
Answer:
x+y=5
Step-by-step explanation:
Step-by-step explanation:
Let the original speed of the train be x km/h.
Time taken to cover a distance of 360 km = 360/x hours.
New speed of the train = (x+5) km/h.
Time taken to cover a distance of 360 km at new speed = 360/x+5 hours.
Since, the train takes 1 hour less time,
∴360/x - 360/ x+5 = 1
⇒360 (5) = x² + 5x
⇒1800 = x² + 5x
⇒x² + 5x - 1800 = 0
⇒x² + 45x - 40x - 1800 = 0
⇒x (x+45) - 40( x +45) = 0
⇒(x+45) (x-40) = 0
⇒x = (-45), 40
But since speed cannot be in negative.
∴x = 40 km/hr.
Hence, the original speed of the train is 40 km/h.
Vcone=(1/3)hpir^2
base=diameter=2rdaius=6
diameter/2=3=radius
height=9.2
Vcone=(1/3)(9.2)pi(3^2)
Vcone=9.2pi3
vcone=27.6pi cm^3
aprox pi=3.141592
vcone=86.707 cm^3
round
86.7 cm^3
Answer:
Step-by-step explanation:
