a lorry is travelling at 13.5 m/s along a stretch of road where the speed limit is 50 km/h show that the lorry is travelling below the speed limit
Answers
ra = 1 cm , rb = 2cm and rc = 3 cm
step-by-step explanation:
in the given data you've missed one word:
"three cylinders have a volume of 2836 cm^3 each "
according to this we have:
v₁ = v₂ = v₃ = v = 2836 cm³, ha = 900 cm, hb = 225 cm and hc = 100 cm and π ≈ 3.14
formula for calculating volume is:
v = b · h, where b is base of the cylinder and h is height of the cylinder.
ba = v / ha = 2836 / 900 = 3.15 cm²
ba = ra² · π ⇒ ra² = ba / π = 3.15 / 3.14 ≈ 1 cm² ⇒ ra = √1 = 1 cm
ra = 1 cm
bb = v / hb = 2836 / 225 = 12.6 cm²
bb= rb² · π ⇒ rb² = bb / π = 12.6 / 3.14 ≈ 4 cm² ⇒ rb = √4 = 2 cm
rb = 2 cm
bc = v / hc = 2836 / 100 = 28.36 cm²
bc = rc² · π ⇒ rc² = bc / π = 28.36 / 3.14 ≈ 9 cm² ⇒ rc = √9 = 3 cm
rc = 3 cm
god with !
Make it brainliest answer
Answer:
These calculations are required to get all the marks
13.5 m/s×3600=48600
48600÷1000=48.6km/h
50 km/h > 48.6 km/h
Step-by-step explanation:
I honestly don't know why you do the calculations, that's just what I've been taught