৫৮০১
Alam sold an item for Tk. 6,384 and incurred a loss of 30%. At what price should he have sold the item to have gained a profit of 30% ?
উত্তর
Tk. 11,856
৫৮০২
Kiran purchased a scooter for Tk. 52000. He sold it at loss of 10%. With that money be purchased another scooter and sold it at profit of 20%. What is his overall loss/profit?
উত্তর
Tk. 4160 profit
৫৮০৩
A square is inscribed in a circle of diameter 2a and another square is circumscribing circle. The difference between the areas of outer and inner squares is -
উত্তর
2a2
৫৮০৪
The average of nine numbers is 50. The average of the first five numbers is 54 and that of the last three numbers is 52. Then the sixth number is -
উত্তর
24
৫৮০৫
A batsman has a certain average of runs for 12 innings. In the 13th inning, he scores 96 runs thereby increasing his average by 5 runs. what is his average after the 13 innings ?
উত্তর
36
৫৮০৬
A man takes 3 hours 45 minutes to row a boat 22.5 km downstream of a river and 2 hours 30 minutes to cover a distance of 10 km upstream . Find the speed of the river current in km /hr.
উত্তর
1 km/hr
৫৮০৭
A man can row 6 km/hr in still water. If the speed of the current is 2 km / hr. It takes 3 hrs more in upstream than in the downstream for the same distance. The distance is -
উত্তর
24 km
৫৮০৮
A train 150m long passes a pole in 15 seconds and crosses another train of the same length travelling in opposite direction in 8 seconds. The speed of the second train in (km/h) is -
উত্তর
99 km/hr
৫৮০৯
The ratio of the speeds of a train and a man 6 : 1 . The length of the train is 650 m and crosses a pole in 1 minute 5 seconds. In how much time will the man cross the 240 m long platform?
উত্তর
2 min 24 sec
৫৮১০
If the numerator of a fraction is increased by 150% and the denominator of a fraction increased by 200% fraction becomes 10/19. Find the fraction.
উত্তর
12/19