৩১৯৫২
A machine can produce 10 units in 5 hours. Another machine can produce 5 units in 10 hours. Working together, how many units can they produce in 30 hours?
উত্তর
50 units
৩১৯৫৩
In a school, 40% of the students are male and all the students like either math or English. If 60% of the students like math and 30% of the students are male who like English, what percentage students of the class are female students who like English?
উত্তর
5%
৩১৯৫৪
Three partners shared the profit in a business in the ratio 5: 7: 8. They had partnered for 14 months, 8 months and 7 months respectively. What was the ratio of their investment?
উত্তর
20 : 49 : 64
৩১৯৫৫
Kalam has invested a part of 10,000 Taka in an account that pays 6% simple interest rate each year and rest of the money in another account that pays 8% simple interest per year. If he has invested the money for 18 months and he has invested the money for 18 months and he earns a total of 1,020 Taka as interest, what is the difference in the amount of the interest earned on both the accounts?
উত্তর
60 Taka
৩১৯৫৮
A delivery car went from Candleford to Lark Rise and back at an average speed of23 miles per hour. If the distance from Candleford to Lark Rise is 1 mile, and the trip back too half as much time as the trip there, what was the average speed of the delivery car on the way to Lark Rise?
উত্তর
12
৩১৯৬০
On Tuesday Ray rode his bike 10 miles. On Wednesday he increased Tuesday’s distance by 5 miles. On Thrusday he decreased Wednesday’s distance by 7 miles. On Friday he increased Thrusday’s by 12 miles. How many total miles did Ray ride over the 4 day period?
উত্তর
53