3501: A grocer bought 10 kg of apples for Rs. 81 out of which one kg was found rotten. If he wishes to make a profit of 10%, at what rate per kg. he should sell it?
(a) Rs. 9.00
(b) Rs. 9.90
(c) Rs. 10.10
(d) Rs. 10.20
3502: Mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?
(a) Hydrogen and oxygen
(b) Oxygen and acetylene
(c) Methane and air
(d) Carbon dioxide and methane
3503: The economic cost of food grains to the Food Corporation of India is Minimum Support Price and bonus (if any) paid to the farmers plus
(a) transportation cost only
(b) interest cost only
(c) procurement incidentals and distribution cost
3504: Which of the following Muslim rulers enforced price control system ?
(a) Alauddin Khilji
(b) Mohammad Tughlaq
(c) lltutmish
(d) Balban
3505: Which of the following pairs is correct?
(a) Surdas : Sahitya Lahari
(b) Somesgara : Charu Chintamani
(c) Kalhana : Ashtadhyayi
(d) Satyanarayana : Mahabharata