(11) The fourth proportional to 0.12, 0.21, 8 is
(a) 43
(b) 16
(c) 14
(d) 34
(12) On what sum does the difference between the compound interest and the simple interest for 3 yr at 10% is Rs. 31?
(a) Rs. 1300
(b) Rs. 2000
(c) Rs. 1000
(d) Rs. 1100
(13) A work is completed by P and Q in 12 days, Q and R in 15 days, R and P in 20 days. In how many days P alone can finish the work?
(a) 18
(b) 30
(c) 23
(d) 40
(14) A reduction of 20% in the price of oranges enables a man to buy 5 oranges more for Rs. 10. The price of an orange before reduction was
(a) 50 paise
(b) 46 paise
(c) 30 paise
(d) 100 paise
Pages: 1 2