Question
The length of a side of an equilateral triangle is 18
cm. The area (in cm²) of the region lying between the circumcircle and the incircle of the triangle is [use use π =22/7]Solution
Side of the equilateral triangle = 18 cm Radius of circum - circle R = 18/√3 cm Radius of in - circle r = 18/2√3 = 9/√3 cm Area between the circum - circle and in – circle = π (R2 – r²)  = π (R+ r) (R-r) = (22/7) × (18/√3 + 9/√3) (18/√3-9/√3) = (22/7) × 27/√3 × 9/√3 = (81×22)/7 = 1782/7 cm² =254(4/7) cm2
Seven persons F, G, H, I, J, K, and L have different number of chocolates. Only I has more chocolates than J. K has more chocolates than L and F. F has...
Who among the following is the third lightest person?
There are five persons Z, X, V, B and N of different ages. V is older than Z and B, but younger than X, who is not the oldest. Find the oldest person?
Who among the following has the second highest number of chocolates?
What is the probable weight of S?
If weights of third heaviest person and O are 65 Kg and 43 Kg respectively, weight of N can be ______.
Read the directions carefully and answer the following questions.
D, B, F, C, G, A and E are of different weights. Only G is lighter than F. C ...
Read the direction carefully and answer the questions based on them.
Six players L, M, N, O, P, and Q scored different runs in a cricket match....
Which of the following student is second tallest student?
What is the weight of T?
Relevant for Exams:
