Tutoring with Ajay Singh

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Let the tower be X m more than the building .then since elevation of the tower from the top of building is 45 degree so it will form an isosceles triangle .so the distance between the two will also be Xm. now using angle 60 degree triangle tan60=X+40/X. solving this X=20*(root 3+1) so height of tower =40+X=40+20*(root3+1)=94.64m

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When, angle of elevation is 45, the length of shadow = height of tower = 100 m [since, cot45 = 1]. When, angle of elevation is 30, the length of shadow = root3*height of tower = 100*root3 m [since, cot45 = 1] = 100*1.732 m = 173.2 m. Hence, difference between the lengths of the shadows = (173.2 - 100)m = 73.2 m. Ans.

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we know that Tan 60 = h/2, hence h= 3.46 metres

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according to V = u + at u = v - at = 0 - (-2)*10 = 20m/s

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They are brothers

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Facing towards south she turns and moves 20 km east. again she turns and move 10 km north again move 20 km towards west, from the reference line.she is 40 km her position from starting point can be find out by Pythagoras theorem i.e, square root(40^2+10^2)= sq. root(1600+100)=41.23 km

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sum =(21+4)×4=100 after 5 years avg age = 24 so total sum = 24×4=120 so 5th frnds age = 120 -100 = 20 years

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CP = 12500 Marked Price (MP) = 12500 + (10% of 12500)= 13750 Sold at discount of 5% on MP. Means, Selling Price (SP)= 95% of MP = 95% of 13750 = 13062.5 Profit %age = (profit/CP)x100 = ((SP-CP)/CP)x100 = (562.5/12500)x100= 4.5 % So, the profit percent on the CP is 4.5%.

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use pencil and practice more and more on cursive book

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Carbon dioxide is released in this acid-base chemical reaction, which causes the sound as well as effervesce(bubble formation) that can be seen in the vinegar.