1. The average height of the students in a class of 10 is 105 cm. If 20 more students with an average height of 120 cm join the class, what will the new average height be (d)
(a) 105 cm
(b) 110 cm
(c) 112 cm
(d) 115 cm
2. What will be simple interest for 1 yr and 4 months on a sum of Rs. 25800 at the rate of 14% per annum? (a)
(a) Rs. 4816
(b) Rs. 2580
(c) Rs. 4816.75
(d) Rs. 4815
3. Rs. 1000 are invested at 5% p.a. simple interest. If the interest is added to the principal after every 10 years, the amount will become Rs. 2000 after (b)
(a) 15 years
(b) 50/3 years
(c) 18 years
(d) 20 years
4. A rectangular carpet has an area of 120 square metres and a perimeter of 46m. The length of its diagonal is: (d)
(a) 11 m
(b) 13 m
(c) 15 m
(d) 17 m