Question
Ram has Rs. 1000 in denomination of Rs. 2, Rs. 5 and Rs. 10
only. If the ratio of number of coins of Rs. 2, Rs. 5 and Rs. 10 is 5:3:10 respectively. Find the total number of coins.Solution
Let the number of coins of Rs. 2, Rs. 5 and Rs. 10 be 5x, 3x and 10x respectively.
ATQ,
Or, (5x X 2 + 3x X 5 + 10 X 10x) = 1000
Or, 125x = 1000
So, 'x' = 8
Therefore, required number of coins = (5x + 3x + 10x) = 18 x 8 = 144
6 mangoes are bought for Rs 24 and 3 mangoes are sold for Rs 18. Find the percentage profit or loss.Â
A car travels from City A to City B, which is 240 km apart. It travels the first 120 km at a speed of 60 km/h and the remaining distance at a speed of 8...
4, 5, 18, 95, 672, ?.
A cyclist travels from point A to point B at a speed of 12 km/h and returns at a speed of 15 km/h. Calculate the average speed for the entire trip if th...
If the homogeneous system of equations
x + y + z = 0
2x + 3y + 4z = 0
has a non-trivial solution, then the value of k is:
3x + 5y + kz = 0
A container has 360 litres of a mixture containing milk and water in the ratio of 3:2. 50 litres of milk and ‘p’ litres of water are added into the ...
In a school, Class 10 is divided into two sections. Section A has 100/3%Â of the total students, while the rest are in Section B. If 15 students from S...
Amit can complete a task alone in 20 days. Bheema and Chetna, working together, can complete the same task in 12 days. The ratio ...
Let vectors a, b, and c be such thata · b = 0, b · c = 0, and c · a = 0.
If |a| = 2, |b| = 3, |c| = 6, then the volume of the parallelepiped f...A bag contains red, blue, and green balls in the ratio of 2:4:5. If two balls are randomly selected from the bag, the probability that both are blue is ...
Relevant for Exams:
