
It is given that, AB \(||\) CD.
EF \(⊥\) CD
\(∠\)GED = 126º
\(⇒\) ∠GEF + \(∠\)FED = 126º
\(⇒\) \(∠\)GEF + 90º = 126º
\(⇒\) \(∠\)GEF = 36º
\(∠\)AGE and \(∠\)GED are alternate interior angles.
\(⇒\) \(∠\)AGE = \(∠\)GED = 126º
However, \(∠\)AGE + \(∠\)FGE = 180º (Linear pair)
\(⇒\) 126º + \(∠\)FGE = 180º
\(⇒\)\(∠\)FGE = 180º − 126º = 54º
∴ \(∠\)AGE = 126º, \(∠\)GEF = 36º, \(∠\)FGE = 54º
Length (in hours) | Number of lamps |
|---|---|
300 − 400 | 14 |
400 − 500 | 56 |
500 − 600 | 60 |
600 − 700 | 86 |
700 − 800 | 74 |
800 − 900 | 62 |
900 − 1000 | 48 |
(i) Represent the given information with the help of a histogram.
(ii) How many lamps have a lifetime of more than 700 hours?
Why was Santosh sent to the local school?