Question
A’s age is 120% of what he was 4 years ago, But 30% of
what it will be after 5 years. What is his present age?Solution
Let present age of A be x years. => 120% of (x - 4) = 30% of (x + 5) => 4(x - 4) = (x + 5) => 4x – 16 = x + 5 => x = 7 years
A person 'P' invested a total amount of Rs. 1800 in two SIPs, A and B, maintaining a ratio of 3:2. SIP A provides simple interest at a rate of 10% per a...
If the total students in E are 30% more than total students in A and the total teachers in E are 40% more than total teachers in C, then find the total...
'Pari' bought three items Pen, Pencil and Table and she marked them some percentage above their cost price and sold them after gi...
The ratio of ages of A and B is 4:3. If A is 5 years older than B, find the age of B.
I). p 2  – 17p + 70 = 0
II). q 2  – 25q + 154 = 0
The volume and height of a cylinder are 5346 cm3 and 21 cm. Find the radius of the cylinder.
When 15 is added to 30% of a certain number, the result is equal to one-third of that same number. Determine the value of the number.
A boat can travel 36 km upstream in 6 hours. The same boat can travel 63 km downstream in 3 hours. What is the speed of the boat in still water?
A and B start a business with investments of ₹50,000 and ₹40,000, respectively. After 6 months, C joins with an investment of ₹60,000. At the end ...
Train X is moving at a relative speed of 288 km/hr with respect to Train Y, which is approaching from the opposite direction. The two trains completely ...
Relevant for Exams:
