1) 2 2) 3 3) 4 4) 5 Solution: (3) 4 Let x and y be the number of tables and chairs. The cost of x table = Rs. 250 and cost of y chair = Rs.... View Article
1) square 2) cyclic quadrilateral 3) rectangle 4) none of these Solution: (2) cyclic quadrilateral If O is the foot of the flagstaff, then... View Article
1) (É‘ / 1) tan É‘ cot A 2) (É‘ / 2) cot É‘ tan A 3) (É‘ / 2) tan É‘ cosec A 4) (É‘ / 2) cosec É‘ tan A Solution: (3) (É‘ / 2) tan É‘ cosec A Let h be... View Article
1) 25 / [√3 + 1] m 2) 25 / (√√3 + 1) m 3) 25 / √3 m 4) none of these Solution: (2) 25 / (√√3 + 1) m Let h be the height of the tower at... View Article
1) sin-1 [a sin α sin β] / [h sin (β - α)] 2) cos-1 [a sin α sin β] / [h sin (β - α)] 3) tan-1 [a sin α sin β] / [h sin (β - α)] 4) none of... View Article
1) 100 m 2) 150 m 3) 200 m 4) 300 m Solution: (3) 200 m Let AP be the electric pole of height h. AB / h = cot 60o AB = h / √3 = AC = BC... View Article
1) 48√2 sq m 2) 48√3 sq m 3) 12√3 sq m 4) 12√2 sq m Solution: (1) 48√2 sq m AE is the vertical lamp-post. AE = 12m tan 45o = AE / AC AC... View Article
1) 62 m 2) 301 m 3) 101 m 4) 75 m 5) 52 m Solution: (5) 52 m The tower is AB. ∠ACB = 60o ∠ADB = 30o Length of shadow = DB CD = 60m In... View Article
1) b tan α cot β 2) b cot α tan β 3) b cot α cot β 4) b tan2 α cot β Solution: (1) b tan α cot β Assume x to be the distance of point A... View Article
The hydrocarbon vapours are heavier than air. The vapour form of hydrocarbon will get collected in enclosed or low spaces. These vapours are... View Article
During reverse polymerization, organic waste is broken down into simpler components by applying a high energy microwave. Molecular bonds are... View Article
The heat pumps lose efficiency below 32-degree Fahrenheit. At very low temperatures heat pumps must rely on secondary sources to heat up the room.... View Article