Find the area of the largest triangle made in a semicircle of r cm radius?
(A)
(B)
(C)
(D)
A hexagon is inscribed in a circle of radius 14 cm, three of its alternates sides are 22 cm and each and other sides are equal find the length of other three sides?
(A) 14 cm
(B) 8 cm
(C) 26 cm
(D) 4 cm
The perimeter of two squares are 24 cm and 32 cm . The perimeter (in cm) of a third square equal in area to the sum of the areas of these squares is:
(A) 32
(B) 48
(C) 45
(D) 40
An Aeroplan flying horizontally at a height of 3 km. Above the ground is observed at a certain point on earth to subtend an angle of 60 °. After 15 sec flight, its angle of elevation is changed to 30 °. The speed of the Aeroplan (taking √3 = 1.732)
(A) 235.93 m/sec.
(B) 236.25 m/sec.
(C) 230.63 m/sec.
(D) 230.93 m/sec.
129 meter from the foot of a cliff on level of ground, the angle of elevation of the top of cliff is 30 °. The height of this cliff is
(A) 43√3 metre
(B) 47 √3 metre
(C) 50 √3 metre
(D) 45 √3 metre
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