Question
A boat takes 3 hours to travel 24 km downstream and 4
hours to travel 16 km upstream. What is the speed of the current?Solution
Speed downstream = Distance/Time = 24/3 = 8 km/hr Speed upstream = Distance/Time = 16/4 = 4 km/hr Speed of current = (Downstream speed - Upstream speed) / 2 = (8 - 4) / 2 = 4/2 = 2 km/hr. Correct Option: c) 2 km/hr
A person spends 40% of his income on rent, 30% on food, and 20% on education. If he saves ₹2000, what is his total income?
Let A be a 3×3 matrix such that AT =−A and all diagonal entries are zero.
Which of the following is always true ?
An item is marked at Rs. 12,500. If it is sold for Rs. 8,500, Determine the % of discount given?
Find the volume of a frustum of a cone with a height of 9 cm, the radius of the upper base as 4 cm, and the radius of the lower base as 6 cm. (Use π = ...
The cost price ratio of the item 'watch' to the item 'ring' is 3:2, while the cost price ratio of the item 'ring' to the item 'ke...
In a class, 70% of the students are adults, and 40% of the adults are females. If the number of adult males in the class is 105, ...
Two individuals, A and B, started a business by investing ₹7,200 and ₹11,700, respectively. After 20 months, A withdrew his entire investment. At th...
Which of the following statements is true about LPP?      Â
Quantity I: ‘X’ – For a number greater than one, the difference between the number and its reciprocal is equal to 40% of t...
A person buys 2 items for ₹300 each. He sells one at a profit of 10% and the other at a loss of 10%. What is the overall gain or loss percentage?