15 men can finish a piece of work in 40 days. The days after which 5 men should leave the work so that the work is finished in 45 days altogether is

• 10

• 20

• 30

• 30

52.

Cost price of an article is ₹ 200/-. If 20% profit is made after giving 20% discount on marked price, the marked price is

• ₹ 300/-

• ₹ 320/-

• ₹ 420/-

• ₹ 420/-

The sum of three numbers is 540. The ratio of second to third is 9 : 13 and that of first to third is 2 : 7. The third number is

• 273

• 280

• 250

• 250

An article is sold at a certain price. If it is sold at half of the previous selling price, then there is a loss of  The profit after selling the article at the previous selling price is:

• 51%

• 49%

• 
• 

If A's salary is 30% more than that of B, then how much percent is B's salary less than that of A?

• 13.01%

• 13.07%

• 23.07%

• 23.07%

A man travels for 14 hours 40 min. He covers half of the journey by train at the rate of 60 km/hr and rest half by road at the rate of 50 km/hr. The distance travelled by him is

• 720 km

• 800 km

• 960 km

• 960 km

The rate of simple interest for which ₹ 6,000/- will amount to ₹ 6,900/- in 3 years is

• 5%

• 7%

• 2%

• 2%

If (a + b)² = 100 and (a - b) = 4, then ab equals to

• 116

• 84

• 21

• 21

If a + b = 3,  then the value of a³ + b³ + 9ab is

• 27

• 9

• 16

• 16

In a Δ ABC, D and E are points on AC and BC respectively, AB and DE are perpendicular to BC. If AB = 9cm, DE = 3 cm and AC  = 24 cm, then AD is

• 32 cm

• 16 cm

• 8 cm

• 4 cm