The floor of a hall has an area of 48 dm.The floor is to be tiled by triangular tiles.of sides 20 cm,30 cm and 40 cm. Find the total cost of tiles if cost of each tile is Rs.200.
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convert cm to dm
1 dm = 10 cm
side a: 20 cm ⇒ 20cm * 1dm/10cm = 20dm/10 = 2 dm
side b: 30 cm ⇒ 30cm * 1dm/10cm = 30dm/10 = 3 dm
side c: 40 cm ⇒ 40cm * 1dm/10cm = 40dm/10 = 4 dm
We need to get the area of a triangle, but first we need to solve for its height using Heron's formula
s = (a+b+c)/2 = (2+3+4)/2 = 9/2 = 4.5
Area = √(s(s-a)(s-b)(s-c)
h3/2 = √4.5(4.5-2)(4.5-3)(4.5-4)
h3/2 = √4.5(2.5)(1.5)(0.5)
h3/2 = √8.44
h3/2 = 2.91
h = (2.91*2)/3
h = 1.94
A = hb/2 = (1.94*3)/2 = 5.82/2 = 2.91 dm²
48 dm² / 2.91dm² = 16.5 or 17 tiles needed
17 x Rs200 = Rs3,400 is the total cost
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-Amanda
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Answer:
Carrie will pay $105 each month.
Step-by-step explanation:
Carrie borrowed $840 from a friend to pay for a car repair. Carrie promises to repay her friend in 8 equal monthly payments.
That means the payments will be = dollars at each month.
And no remainder amount is left.
Answers
Answer:
x=31
Step-by-step explanation:
x-10+x-10+x-10=63 (equation)
3x-30=63 (combine like terms)
3x=93 (combine like terms again)
x=31 (divide both sides by 3)
Answers
4:10= 14
6:15= 21
8:20= 28
10:25= 35
10 beakers and 25 test tubes
Hope this helped!!!
Answers
The number of times Jana will roll a 2 will be 13.
What is Probability?
Probability is simply the possibility of getting an event. Or in other words, we are predicting the chance of getting an event.
The value of probability will be always in the range from 0 to 1.
Given that,
Jana has a number cube numbered 1 to 6.
When Jana rolls the number cube 1 time, there is an equal chance of getting each number.
Probability that the number is 2 = 1/6
So, there is a 1/6 probability that the number rolled is 2.
Jana plans to roll the cube 78 times.
So the number of times Jana will roll a 2 = 78 × (1/ 6) = 13
Hence the number of times that Jana will roll a 2 in the number cube is predicted as 13.
Learn more about Probability here :
#SPJ6
78/6 = 13 is probability.
Hope i become the brainliest.
Answers
Answer:
Answer:
16+x
Step-by-step explanation: