A certain sum of money is invested in scheme A for 3 years. A sum of Rs. 1008 was obtained as simple interest at the rate of 6% per annum. Find the simple interest obtained when the same amount is invested in scheme B at the rate of 8% per annum for 5 years.

The respective ratio between the speeds of two trains A and B is 5 : 6. Train B takes 2 hours 15 minutes to cover a distance of 216 km. What will be the time taken by train A in covering a distance of 200 km ?

The sum of Aditi's age 5 years ago and Dimple's age 6 years ago is 41 years. The respective ratio of Aditi's age 6 years hence from now and Dimple's age 5 years hence from now will be 10 : 11. What is Aditi's present age ? (In years)

Two inlet pipes can separately fill an empty tank in 8 and 10 hours respectively and an out let pipe can empty the full tank in 15 hours. If all three pipes are opened simultaneously in the empty tank, in what time will the tank be filled ?

When all three pipes are opened simultaneously, part of tank filled in an hour = $1 \over 8$ + $1 \over 10$ - $1 \over 15$ = ${15 + 12 - 8} \over 120$ = $19 \over 120$ Required time = $120 \over 19$ = 6 $6 \over 19$ hours

Preksha has x notes of 50 rupee denomination and 3x notes of 20 rupee denomination. Total amount with her is equal to (x + 4) notes of 50 rupee denomination and (x + 14) notes of 20 rupee denomination. Find the value of 3x.

The simple interest earned on a certain sum (Rs. P) when invested for three years at the rate of 7% per annum is equal to the simple interest earned when Rs. (P - 1500) is invested for five years at the rate of 6% per annum. What is the value of P? (in Rs.)

The compound interest (compounded annually) on a certain sum of money for 2 years at the rate of 20 per cent per annum is Rs. 1496. What would be the simple interest on the same sum of money for 3 years at the rate of 11 per cent per annum?

Perimeter of a square, whose diagonal is 43$\sqrt {2}$ metre, is equal to the perimeter of a rectangle. If the difference between length and breadth of the rectangle is 8 metre, what is the area of the rectangle? (in $metre^2$)

$7 \over 9$th of the boys and $8 \over 13$th of the girls of a school participated in a marathon. If the number of participating students is 238, out of which 112 are girls, what is the difference between number of boys and number of girls in the school?

The average weight of A, B and C is 20 kg. Weight of A is four times of that of B, and weight of C is 21 kg less than A's weight. What is A's weight? (in kg.)