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Preeti Dabral 2 years ago
Here, l = 6 m, b = 5m and h = 4m
{tex}\therefore{/tex} Area of the walls = 2h(l + b) = { 2 {tex}\times{/tex} 4 {tex}\times{/tex} (6 + 5)}m2 = (8 {tex}\times{/tex} 11)m2 = 88m2
Cost of white washing of 1 square metre = Rs.25
{tex}\therefore{/tex} Cost of white washing the walls = Rs.(25 {tex}\times{/tex} 88) = Rs.2200
Posted by Palavalasa Harsha Vardhan 2 years ago
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Preeti Dabral 2 years ago
| Marks | No. of students fi |
xi | fixi |
| 45-55 | 3 | 50 | 150 |
| 55-65 | 10 | 60 | 600 |
| 65-75 | 11 | 70 | 770 |
| 75-85 | 8 | 80 | 640 |
| 85-95 | 3 | 90 | 270 |
| Σfi=35 | Σfixi=2430 |
We know that, arithmetic mean {tex}=\frac{\Sigma \mathrm{f}_{\mathrm{i}} \mathrm{x}_{\mathrm{i}}}{\Sigma \mathrm{f}_{\mathrm{i}}}{/tex}
∴Mean literacy rate{tex}=\frac{2430}{35}=69.43 \%{/tex}
Posted by Rahul Raj 2 years ago
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Preeti Dabral 2 years ago
Given in triangle ABC And triangle ADE BC || DE
Also AD/DB = 3/5,AC = 5.6
To find AE
In trinagle ABC And ADE
AD/BD = AE /EC. ----EQ 1........ ( By basic proportionality theorem....)
Doing reciprocal both sides we get
BD/AD = EC/AE
On adding 1 both sides we get,
BD + AD/AD = EC + AE/
= AB/AD = AC/AE
= 8/3 = 5.6/AE
= AE = 3 × 5.6/8
= AE = 2.1 cm Ans..
Hope it will be helpful
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