Question
The base of a right pyramid is a square of side 10 cm.
If its height is 10 cm. then the area (in cm2) of its lateral surface is:Solution
Slant height = EF Height = EO = 10 cm OF = 10/2 = 5 cm In ΔEOF, EF^2 = OE^2 + OF^2 ⇒ 10^2 + 5^2 ⇒ EF = √125 = 5√5 Slant height = EF = 5√5 cm Perimeter of the base = 4 × 10 = 40 cm Lateral surface = (1/2) × Perimeter of the base × Slant height ⇒ (1/2) × 40 × 5√5 ⇒ 100√5 cm^2
“Checkmate” is related to “Chess” in the same way as “Birdie” is related to ____.
Burma : Kyat:: Israel: ?
Select the set of numbers that is similar to the following set:
(11, 133, 56)
In the following question, select the related number from the given alternatives.
(NOTE: Operations should be performed on the whole numbers, ...
If 51 @ 24 = 9' and 56 @ 22 = 8', then 72 @ 32 = ?'. What will come in place of question mark?
E × I : 25 × 81 ∷ K × P : ?
If 5Ω9 = 90, 9Ω4 = 72 and 3Ω9 = 54, then find the value of 6Ω5 = ?
Black : Sorrow ∷ Red : ?
If 42 @ 21 = 18' and 35 @ 27 = 18', then 46 @ 32 = ?'. What will come in place of question mark?
Given set: [40, 36, 28]
