The average age of a group of 10 students is 15 years . when 5 more students joined the group , the average age rise by 1 year. what is average age of the newly joined students?
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17
18
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A team of 2 men and 5 women completed one-fourth of a job in 3 days. After 3 days another man joined the team and they took 2 days to complete another one-fourth of the job. How many men can complete the whole job in 4 days?
Mr. Karim borrowed Tk. 500 at 5% simple interest per year. After some time, he borrowed Tk. 400 at 312% simple interest per year for the second time. Six months after the second time borrowing, he repaid both the borrowed money along with interest and the amount repaid was Tk. 994.50. How many years after the first time borrowing Mr. Karim repaid the borrowed money?
The total price of Cricket bat and ball is 1,350. If the price of bat increases 25% and the price of ball decreases 20% then the total price of bat and ball remains same. Find the prices of bat and ball?