Answer: 55.4 mins
Step-by-step explanation:
pragnesh and qazi = 2hrs
pragnesh and roghui = 3hrs
qazi and roghui = 4hrs
this means for every 1 hour they wold paint.
pragnesh and qazi = half of the fence
pragnesh and roghui =
qazi and roghui = quarter of the fence
time taken when they all work together
= + +
=
=
= 0.9231 × 60(mins)
= 55.4 mins
Answer:
12 tea bags
Step-by-step explanation:
3x4=12
Answer:
Length of rear-view mirror = 0.3462 m
Step-by-step explanation:
- As per the attachment first thing we need to calculate is the angle of incidence of light "α" reflected from the rear view mirror to the eyes of the driver.
- As per the diagram the following calculations are:
- α = arctan(half length L of the rear view window / distance between the focus point and the centre of the rear view window).
- half length L of the rear view window = 1.5/2 = 0.75 m
- Distance between the focus point and the center of the rear view window = 0.6+2.0 = 2.6 m
hence,
- α = arctan(0.75/2.6)
- α = 16.091 degrees
Now the we will use α to calculate length of the rear view mirror.
length of the rear view mirror = 2 x 0.6 x tan(α)
length of the rear view mirror = 2 x 0.6 x tan(16.091)
length of the rear view mirror = 0.3462 m
490,000,000 the answer to the question
Answer Interest rate = 12.3%
The compound interest formula is given by:
Where
A = Future amount
P = Present amount (Principal amount)
r = Interest rate in decimal form
n = No. of times compounded per year
t = time in years.
We can say that if:
Present amount = P
Future amount = 3P
r = 12.3/100 = 0.123
n = 1
t = ?
Substitute the values in the formula of compound interest:
Taking log on both sides.
Round off to nearest option
t ≅ 9 years