Dish Antenna of your DTH connection is mounted on
the terrace wall with the help of stand as shown in
picture. Shalini observed that the one arm AC of stand
is at right angle to other arm AD which are fixed with
screws on the wall as shown in picture and if AC = 1.5m
long and CD = 3m, then answer following questions.
1. The length of other arm AD of antenna stand is:
(a) 1.5√3m
(b) 2√3m
(c) 1.5m
(d) 4m
Answers
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Given : AC is right angle to AD
AC = 1.5 m , CD = 3m
To Find : AD
Solution:
Using Pythagorean theorem
CD² = AC² + AD²
=> 3² = 1.5² + AD²
=> AD² = 3² - 1.5²
=> AD² = 1.5²(4 - 1)
=> AD² = 1.5²(3)
=> AD = 1.5√3 m
length of other arm AD of antenna stand is: 1.5√3 m
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