For the following questions answer them individually
A alone can do a work in 30 days. B alone can do the same workin 40 days. If they work on alternate days starting with A, then in how many days(correct up to two places of decimal) the work will be completed?
Side of a square is 6 cm. What is the area of the largest circle that can be drawn inside the square?
(Take $$\pi = \frac{22}{7}$$)
A and B together can do a piece of work in 20 days. B and C together can do the same of work in 25 days. C and A together can do the same work in 15 days. In how many days A alone can do the same work?
What is the value of
$$\frac{3}{4} of \left(\frac{1}{3} \div \frac{1}{2}\right) + \left(2 - \frac{2}{5}\right) \times \frac{3}{2} + \frac{2}{3}$$?
Average weight of 8 gold coins is 20 g per coin. Average weight of 12 silver coins is 35 g per coin. What is the average weight per coin for 20 coins?
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