On walking 100 metres towards a building in a horizontal line, the angle of elevation of its top changes from 45 to 60 deg. What will be the height (in metres) of the building?
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ΔDEF is similar to ΔGHI. Length of DE is 9 cm and length of the corresponding side GH is 16 cm. What is the ratio of areas of Δ DEF : Δ GHI?
If (X/4) = (Y/5) = (Z/9), then what is X : Y : Z?
What is the value of (sin60° + 2/√3) ?
If (6x - 1) - (8x - 5) = 7, then the value of x is _______ .
A vendor buys 6 bananas for Rs 25 and sells them at 3 for Rs 20. What is his profit percentage?
If a+b-62+a2b2+1+2b=2ab+2a, then the value of a is
What is the value of √2 Sec 45 - Tan 30?