A can do  of a work in 5 days and B can do th of this work in 10 days. Both A and B, together can do the work in

• 

• 

• 

• 10 days

52.

The base area of a right pyramid is 57 sq units and height is 10 units. Then the volume of the pyramid is:

• 190 c. units

• 380 c. units

• 540 c. units

• 570 c. units

The marked price of a ceiling fan is â‚¹ 1,200/- and the shopkeeper allows a discount of 5% on it. Then selling price of the fan is

• ₹ 1,410

• ₹ 1,400

• ₹ 1,140

• ₹ 1,104

If 35% of A's income is equal to 25% of B's income, then the ratio of A's income to B's income is:

• 7 : 5

• 5 : 7

• 4 : 7

• 4 : 3

A and B invest â‚¹ 3,000/- and â‚¹ 2,400/- respectively in a business. If after one year there is a loss of â‚¹ 720/-, how much loss will B bear? (Loss or profit in proportion to their investments)

• ₹ 72/-

• ₹ 320/-

• ₹ 400/-

• ₹ 360/-

• 100

• 200

• 300

• 400

At an average of 80 km/hr Shatabdi Express reaches Ranchi from Kolkata in 7 hours. Then the distance between Kolkata and Ranchi is:

• 560 km

• 506 km

• 560 m

• 650 m

If a³ - b³ = 56  and a - b = 2, then what is the value of a² + b² ?

• 12

• 20

• 28

• 32

If x² - 3x + 1 = 0,   then the value of  is

• 1

• 0

• 3

• 2

X and Y are the mid-points of sides of AB and AC of Δ ABC. If BC + XY = 12 units, then BC - XY is:

• 8 units

• 4 units

• 6 units

• 2 units