Question
The population of a town in 2019 was 'P'. It grew by 15%
in 2020 and then by another 30% in 2021. By the end of 2021, the total population became 39,780. If the male to female ratio in 2019 was 7:8, find the number of males in the town in 2019.Solution
ATQ: P × 1.15 × 1.30 = 39,780 P = 39,780 ÷ 1.495 = 26,600 Therefore, number of males in town in 2019 = (7/15) × 26,600 = 12,412
A, B and C hired a taxi for Rs. 650 and used it for 3, 4, 6 hours respectively. Hiring charges paid by B are:
A and B started a business by investing Rs.450 and Rs.550 respectively. After 8 months, A increased his investment by Rs.850. Find the ratio of annual p...
A and B together start a business with investment of Rs. 2100 and Rs. (x + 800), respectively. If the profit earned after 5 years is Rs. 7000 and share ...
‘Anuj’ and ‘Bheem’ started a business with an investment of Rs. (m + 5000) and Rs. (3m – 2500) respectively. After eight months, ‘Bheem’ i...
‘A’, ‘B’ and ‘C’ entered into a partnership by making investments in the ratio 5:6:9, respectively. At end of the year, if the difference be...
Three partners, R, S, and K, form a partnership business with capitals in the ratio of 3:5:8. After four months, R, S, and K added Rs. 3000, Rs. 4500, a...
Raj and Simran invested in a business in the ratio of 10:6 respectively. After 5 months, Priya joined them, investing an amount equal to their average i...
A and B enter into partnership. A invests some money at beginning, B invests thrice the amount after 5 months and C invests double the amount after 9 mo...
A started a business with an investment of Rs.1800. After some months, B joins the business with an investment of Rs.3600 and after two more months C jo...
'A', 'B' and 'C' started a business such that the sum invested by 'B' is (1/4)th of the total sum invested by all of them together and (1/2) of the sum...
Relevant for Exams:
