Question
At 9:30 a.m., the length of a pole’s shadow is equal
to its height. What is the sun’s altitude at this time?Solution
ATQ, The pole’s height = h, and its shadow = h. In the right triangle formed: Opposite side = height of the pole (h). Adjacent side = shadow (h). Using the tangent function: Hence, the sun’s altitude is 45° .
Now, we Solve for θ : 
A candidate just passed by getting 100 answers correct by attempting 200 of the total questions. Find the total number of questions in the examination i...
Sujata allocated 40% of her annual income to a fixed deposit. She then spent 25% of the remaining amount on house rent and 15% on food. After these expe...
The total strength of school A is 40% more than that of school B. In school A and B, out of total number of students, 25% and 40% respectively are girls...
If decreasing 90 by k% gives ihe same result as increasing 60 by k%, then k% of 120 is how much per cent of [(K + 20)% of 150]
- If the price of wheat rises by 40%, how much percentage reduction in consumption is required so that the total expense remains constant?Give your answer ro...
In 2020, Sumit's expenditure and savings are in the ratio of 4:3 . The following year, his expenditure increases by 25% , and his savings grow by (100/3...
If 75% of a number is added to 75, the result is the number itself, then the number is:
A gets 36% of the full marks in an exam and fails by 90 marks. B gets 39% of the full marks in the same exam and he also fails by 75 marks. What is the ...
- A number is first increased by 18% and then decreased by 18%. The overall change in number is:
A book is listed at Rs. 2,400 and the discount offered is 10%. What additional discount must be given to bring the net selling price Rs. 1,800?
