Question
A rectangular piece of land has a perimeter of 66 metres
and length of 21 metres. If the area of the land is to be divided into 7 equal portions, then what will be the area (in m2) of each portionSolution
Let the breadth of the land = ‘b’ metres Then, perimeter of the land = 2 × (21 + b) Or, 2 × (21 + b) = 66 Or, 42 + 2b = 66 Or, 2b = 66 – 42 = 24 So, b = 24/2 = 12 And so, total area of the land = 21 × 12 = 252 m2 So, area of each of the 7 equal portions = 252 ÷ 7 = 36 m2
Abhinav improved his average travel speed by 8 km/h after journeying for 5 hours, completing his trip in a total of 8 hours. If instead he had boosted h...
In covering a distance of 30 km, Abhay takes 2 hours more than Sameer. If Abhay doubles his speed, then he would take 1 hour less than Sameer. Abhay's s...
During the first 90 km of his trip, 'X' drove at a speed of 60 km/h. In the next 150 km, he increased his speed by 'y%' compared to his initial speed. F...
How many km per hour does a man walk who passes through a street 500 m long in 25 minutes?
A ferry takes 75 minutes to row to place B from another place A along the stream. The distance between place A and place B is 37.5 km. If the speed of t...
1200 metres long train crosses a man who is moving in the same direction with a certain speed, in 30 seconds. If the same train can cross a tree in 20 s...
Two athletes start running on a circular track of length 1,500 metres in the same direction at speeds of 20 m/s and 18 km/h respectively. How many times...
An Aeroplane flies along a Square field @ 75, 100, 150 and 200 km/hours respectively. Then find the Average speed of the Aeroplane during the whole jour...
Car ‘C’ is 200 metres ahead of car ‘D’. Car ‘C’ is moving at 25 m/s and car ‘D’ is moving at 108 km/h. How much time will car ‘D’ ta...
Ratio of speeds of ‘A’ and ‘B’ is 5:7, respectively. If they participate in a 350-metre race and ‘B’ gives ‘A’, a head start of ‘m’ ...
Relevant for Exams:
