Question
The sum of the radius and height of a cylinder is
34m. The total surface area of the cylinder is 5984 m². What is the volume (in m³) of the cylinder?Solution
Total Surface area of the cylinder = 5984 m². ⇒ 2 π r ( r + h ) = 5984 m² ⇒ 2 x `22/7` x r x 34 = 5984 m² ⇒ r = `(5984xx7)/(2xx22xx34)` = 28 ` ` Volume of the cylinder = π r ² h =`(22xx28xx28xx6)/ 7` = 14784 m ³
1470 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 7 se...
The speed of a bike increases by 3 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 25 km, the find the total distance tra...
Before servicing, a car runs at a speed of 45 km/hr while after servicing, it runs at a speed of 90 km/h. After servicing the car covers a certain dista...
Car' A' travels at the speed of 65 km/hr and reaches its destination in 8 hours. Car 'B' travels at the speed of 70 km/hr and reaches its destination in...
A bike departs from point X at 9:00 AM toward point Y, traveling at a speed of 45 km/h. Two hours later, a car starts from point X toward point Y at a s...
Priya travels from station ‘M’ to station ‘N’. If she moves at 45 km/h, she reaches 30 minutes early. If she moves at 30 km/h, she reaches 1 hou...
A train covers a distance between stations Dehradun to Rudrapur in 90minutes. If the speed is reduced by 10 km/hr, it will cover the same distance in 9...
Two trains of lengths 120 m and 150 m are moving in opposite directions at speeds of 45 km/h and 30 km/h, respectively. How much time will they take to ...
A car covers 150 km in 3 hours. How much time will it take to cover 260 km at the same speed?
Two trains X and Y whose length are in ratio of 5:8 and time taken to cross a man standing on a platform is 5:2. If the speed of the train X is 24 km/h ...
Relevant for Exams:
