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Start learning 50% faster. Sign in nowFirst term of AP = a = - 21 & last term = l = 40 Number of terms = n = 14 Sum of AP = n/2 (a + l) = 14/2 (- 21 + 40) => 19 x 7 = 133
If (x + 6y) = 8, and xy = 2, where x > 0, what is the value of (x3 + 216y³)?
A giant circular wheel has a diameter of 28 metres. In how many revolutions will the wheel cover a total of 26.4 km?
If ∆ ABC~∆ FDE such that AB = 9 cm, AC = 11 cm, DF = 16 cm and DE = 12 cm, then the length of BC is:
Find how many cubes of side 10 cm each can be made by melting a cuboid with dimensions 90cm × 120cm × 150cm?
How many spherical lead shots each of diameter 8.4 cm can be obtained from a rectangular solid of lead with dimension 88 cm, 63cm, 42 cm(take π 22/7)?
A rectangular reservoir of 2800 m3 capacity has length and height equal to 10 m and 40 m respectively. if 420 m3 of water i...
The area of four walls of a room is 144 cm2. If the length and breadth of the room were equal and the height of the room is 4 cm, then what i...
The diagonal and one side of a rectangular plot are 65 m and 63 m, respectively. What is the perimeter of the rectangular plot?
A tank whose length, width and height are 21 metres, 17 metres and 10 metres respectively is completely filled with juice. If the juice costs Rs.5/m
A solid metallic rectangular block of dimensions 112 cm × 44 cm × 25 cm is melted and recast into a cylinder of radius 35 cm. The curved surface area ...
