What will come in place of the question mark (?) in the following questions ?
477 $$\div$$ 53 + 64 $$\times$$ 3 = ?
7831.63 + 2593.59 + 194.67 - 5452.21 = ?
666666 - 565656 + 111111 - 999999 = ?
$$\frac{2}{3}$$ of $$\frac{3}{5}$$ of 85% of ? = 952
$$\frac{34}{49} \times \frac{147}{272} \div \frac{27}{32}= ?$$
For the following questions answer them individually
A 380 metre long train crosses a platform in 23 seconds. What is the speed of train ?
What will be the compound interest on a sum of Rs. 9000 at compound interest compounded annually at 8% per annum in two years ?
The radius of a circular room is 21 metre. What will be the cost of carpeting the floor at the rate of Rs. 14 per square metre ?
If 180% of x is equal to 1620, what will be the 45% of x ?
What will be the cost of 14kg of rice bought at Rs. 38 per kg: 25 kg of sugar bought at Rs.19 per kg and 9 kg of salt bought at Rs. 23 per kg ?