Maths

10 men or 16 women can complete a work in 40 days. In how many days 40 women and 15 men together can complete the same work?

If P : Q = 3 : 8, Q : R = 5 : 4 and R : S = 16 : 15, then what is the ratio of P : S?

Ratio of first, second and third number is 3 : 5 : 11 respectively. Difference between third number and first number is 1152, then what will be the sum of second and third number?

A bottle is sold at a profit of 35%. If selling price of the bottle becomes three times, then what will be the profit percentage?

Selling price of 15 Apple is equal to cost price of 21 apple. What will be the profit percentage?

If diagonal of a square is increased by 60%, then what will be percentage increase in the area of the square?

What is the single percentage change equivalent to two percentage decreases of 20% and 40%?

The compound interest earned on  sum in the 6^th year and 7^th year are Rs. 1250 and Rs. 1450 repectively. What is the rate of interest per annum (compounded annually)?

The compounds interest earned in the 5^th year is Rs. 900. If the rate of interest in 25% and interest is compounded annually, then what will be the compound interest (in Rs.) earned in the 6^th year?

Two trains of length 640 metres and 480 metres are moving with the speed of 234 km/hr and 144 km/hr respectively. If both train are moving in the same distance, then in how much time will the faster train can cross the slower train?