A dealer marks the price of an article 40% more than the cost price. He allows 10% commission, his profit percent is
1). 26%
2). 30%
3). 36%
4). 40%
By melting a solid lead sphere of diameter 12 cm, three small spheres are made whose diameters are in the ratio 3 : 4 : 5. The radius (in cm) of the smallest sphere is
1). 3
2). 6
3). 1.5
4). 4
A shopkeeper mixed three qualities of wheat flour costing Rs. 20 per kg, Rs. 25 per kg and Rs. 28 per kg in the ratio 3 ∶ 4 ∶ 5 respectively. At what price should he sell a 10 kg bag of the flour mixture to earn a profit of 30%?
1). Rs. 325
2). Rs. 360
3). Rs. 375
4). Rs. 390
Find the wrong number in the given series:
2, 10, 30, 68, 120, 222If \(a = \sqrt {7 + 2\sqrt {12} }\ and\;b = \sqrt {7 - 2\sqrt {12} }\) then find the value if a3 + b3 + a2 + b2 + 1
1). 72
2). 52
3). 67
4). 68