For the following questions answer them individually
The average marks obtained by Saloni in four papers is 51, and in the fifth paper she gets 56 marks. Find her new average in all five papers.
A and B can complete a work together in 48 days. A is 4 times as work efficient as B. In how many days can B alone complete the work?
For what value of m will the system of equations 18x-72y+13=0 and 7x-my-17=0 have no solution?
From the top of an upright pole $$24\sqrt{3}$$ feet high, the angle of elevation of the top of an upright tower was $$60^{\circ}$$. If the foot of the pole was 60 feet away from the foot of the tower, what tall (in feet) was the tower?
Six years ago, the ratio of ages of A to B was 7 : 5. After 4 years from now, the ratio of their ages will be 11 : 9. What is A’s age at present?
Mrs. Deepa Devi saves 30% of her salary. If she receives Rs.42,000 per month as her salary, what is her monthly expenditure?
Find the amount (integral value only) if a sum of ₹6,500 is being borrowed at 10% interest per annum for 2 years if interest is compounded half-yearly.
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