Question
If a boy walks from his house at 5 Km/hour, he reaches
school 10 minutes early. If he walks at 3 km/hour he reaches 10 minutes late. What is the distance from his house to school?Solution
Let us say that the actual distance between Boy’s house and school is d km and the ideal time to cover the distance is t hours. When he walks at 5 Km/hour, he reaches 10 minutes (or 1/6hours) early ⇒ d/5 = t - 1/6 ⇒ t = d/5 + 1/6 When he walks at 3 Km/hour, he reaches 10 minutes (or 1/6hours) late ⇒ d/3 = t + 1/6 ⇒ t = d/3 - 1/6 By using the above equations, d/5 + 1/6 = d/3 - 1/6 2d/15 = 1/3 d = 2.5 km Alternate method: Distance = Time gap× product of speeds/ gap of speed = 20 min×3×5/(5-3) = 20/60 hrs ×3×5/2 = 2.5 Km
What is the limit of Total Polar Compounds (TPC) in Used cooking Oil?
Which of the following type of mouth parts present in Cockroach and grasshopper?
TheĀ charactersĀ forĀ whichĀ genesĀ areĀ locatedĀ onĀ sexĀ orĀ āXāĀ orĀ analogousĀ āZā chromosomesĀ areĀ knownĀ as
...With how many states does the boundary of Haryana touch?
Select the option that can substitute the underlined part of the sentence. If no substitution is needed, select 'No improvement required'.
This i...
Internal browning in fresh produce is the result of:
Acid delinting is recommended for fuzzy cotton seed at the rate of
The hormone responsible for promoting stomatal closure and water conservation during drought stress is:Ā
Annual water requirement of banana
Boron tolerant crop is
Relevant for Exams:
