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We can use Heron’s formula to find the area of the triangle. First, find the semi-perimeter (s): s = (13 + 14 + 15) / 2 = 21 cm Now, use the formula for area: Area = √[s(s - a)(s - b)(s - c)] Area = √[21(21 - 13)(21 - 14)(21 - 15)] Area = √[21 × 8 × 7 × 6] Area = √[7056] Area = 84 cm² Correct Option: a) 84 cm²
P gave 70% of the amount he had to Q. Q gave 2/5th of that amount to R. After paying Rs.260 to the shopkeeper out of the amount he gets from ...
The boys and girls in a college are in the ratio 4:3. If 15% of the boys and 22% of the girls are adults, the percentage of students who are not adults ...
The salaries of X, Y, and Z are in the ratio 4:3:5. If X’s salary is reduced by 25%, Y’s salary is increased by 33.33%, and Z’s salary is increase...
Initially, a person spends 70% of his salary and saves the remaining 30%. If his salary increases by 20% and his savings remain unchanged, he finds hims...
A girl spent 16% of her monthly income on clothing. Of the remaining, she spent on travel and food in the ratio of 5:2. If the difference of the income ...
Out of the total population in a village 25% casted invalid votes and the winning candidate A received 14(2/7)% more votes than the losing candidate B....
A man spends 72% of his income. If his income increases by 28% and his expenditure increases by 25%, then what is the percentage increase or decrease in...
Ajay spent 36% of his monthly income on rent and 46% of the remaining on food and the rest amount is saved by him which is Rs. 2592, then find the month...
The population of a city is decreased by 20% in the first year and then increased by 30% in the second year. Find the population of the city at the end...
