Question
Two cars start from a place with a speed of 70 km/hr at
an interval of 15 minutes. What is the speed of a man coming from the opposite direction towards the place if he meets the cars at an interval of 14 minutes?Solution
Distance covered in 15 minutes at 70 km/hr = 70 x (15/60) Distance covered in 14 minutes at (70 + x) km/hr = (14/60) x (70 + x) Now, Distance covered in 15 minutes at 70 km/hr = Distance covered in 14 minutes at (70 + x) km/hr ⇒ 70 x (15/60) = (14/60) x (70 + x) ⇒ 70 x 15 = 980 + 14x ⇒ 1050 = 980 + 14x ⇒ 14x = 1050 - 980 = 70 ⇒ x = 5 km/hr
- The ratio between cost price, labelled price and the selling price of a product is 4:10:6. If a profit of Rs. 240 is gained on the sale, find out how much ...
Statement: The Captain Amarinder Singh-led government in Punjab has announced free education for girls in government schools and colleges from Nursery ...
Who is going to Meerut?
- A trader sold two gadgets for Rs. 120 each. One was sold at a profit of 20%, and the other at a loss of 25%. Find the difference in their cost prices.
- In a classroom, students like three different subjects: Math, Science and English in the ratio 5:4:11. If 364 students like Science, then how many students...
In the question below, two statements (I) and (II) are given. These statements may be either independent causes or may be effects of independent causes...
- Two circles are externally tangent to each other. The first circle, centered at X, has a radius of 8 cm, while the second circle, centered at Y, has a radi...
The ratio of the income and savings of John is 5:2, respectively. If his expenditure increases by an amount which is equal to half of his initial saving...
- If ‘742x319’ is a seven-digit number that is exactly divisible by 72, then what is the digit ‘x’?
Six persons K, J, I, H, G, and F live in a six- floor building. The bottommost floor is numbered as 1 and the topmost floor is numbered as 6. H lives im...
Relevant for Exams:
