৭৯২২
A 42-liter mixture contains milk and water in a 3 : 4 ratio. How much milk should be added to the mixture to make the ratio equal?
উত্তর
6 liters
৭৯২৩
Aysha and Jara started a business by investing Tk. 85000 and Tk. 15000 each. What be will the ratio of profit earned after 2 years between Aysha and Jara respectively?
উত্তর
17 : 3
৭৯২৪
A train crosses a platform 300 meters long in 50 seconds and another platform 150 meters long in 35 seconds. What is the length of the train?
উত্তর
200 meters
৭৯২৫
A shopkeeper marks his goods 40% above the cost price and offers a discount of 20% on the marked price. What is his gain percent?
উত্তর
12%
৭৯২৬
What is the compound amount of Tk. 4000 for 2 years at a rate of interest 5% per annum?
উত্তর
Tk. 4410
৭৯২৭
The speed of a boat in still water is 9 km/h. The time it takes to travel downstream is half the time it takes to travel upstream. What is the speed of the stream?
উত্তর
3 km/h
৭৯২৮
60% of a number is 30 less than three-fourth of the same number. Find the number.
উত্তর
200
৭৯২৯
A certain principal amount, invested at simple interest, grows to Tk. 950 after 3 years and Tk. 1010 after 4 years. What is the original principal amount?
উত্তর
Tk. 770
৭৯৩০
Find the rate of discount being given on a shirt whose selling price is Tk. 420 after deducting a discount of Tk. 80 on its marked price.
উত্তর
16%