Question
A boy travels from his home to school by bicycle. Riding
at a speed of 8 km/h, he arrives 18 minutes late. However, if he rides at a speed of 2.5 m/s, he is only 8 minutes late. What is the distance between his home and school?Solution
ATQ,
Let the distance between the home and school be x km Time taken at 8 km/h = T₁ = x/8 hours Speed = 2.5 m/s = (2.5 × 18/5) = 9 km/h Time taken at 9 km/h = T₂ = x/9 hours Difference in time = T₁ - T₂ = (x/8) - (x/9) Given, T₁ - T₂ = 18 - 8 = 10 minutes = 10/60 = 1/6 hour So, (x/8) - (x/9) = 1/6 (9x - 8x)/72 = 1/6 x/72 = 1/6 x = 72/6 = 12 Therefore, the required distance is 12 km.
Seven persons D, E, F, G, H, I and J went to Delhi on seven different days of a week starting from Monday. Only two persons went before I. At least two...
How many persons are celebrating between F and the one who works in Tech Mahindra?
Four of the following five are alike in a certain way and hence they form a group. Which one of the following does not belong to that group?
- There are 6 boxes, S, T, U, V, W and X, which are kept one above the other. Box T is 3 boxes above box U. There is a gap of one box between box T and box W...
How many persons were born between J and O?
Six persons A, B, C, D, E, and F live in a building of six-floors such that the bottommost floor is numbered as 1 and the topmost floor is numbered as 6...
Who among the following live on the topmost floor?
On which floor does the person live who likes Shreya ghoshal?
Which of the following word is coded as “cfz”?
In the questions given below there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be ...
Relevant for Exams:
