Others Maths Puzzle

When the length of the shadow of a pillar on ground is same as the height of the pillar then the angle of elevation of the Sun is:

(A) π/4

(B) π/2

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Others Other Question

if ABCDE *4=EDCBA, then find A+B+C+D+E. if a person spending 75% of his salary in expense. if his salary is incresed by 20% and expense increased by 10%. what is his saving percentage.