exam Maths Puzzle Numerical Ability

I need your help on this problem. a tree 40 feet high casts a shadow 68 feet long. Find the measure of the angle of elevation of the sun

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exam Other Question

can you please help me solve (-3ab)^3(2b^2) a swimming pool can be filled in 18 hours if water enters a pipe alone, or in 25 hours if filled through a hose alone. if water is entering through the hose and pipe both, how long will it take to fill the pool?