###### Q.1A circular grassy plot of land, 42 m in diameter, has a path 3.5 m wide running around it outside. The cost of gravelling the path at Rs. 4 per square meter is :

###### Q.2Two mixers and one T.V. cost Rs. 7,000 while two T.V.'s and 'one mixer cost Rs. 9,800. What is the price of one mixer (in Rupees)?

###### Q.3Teacher took an exam for English, and the average for the entire class was 80 marks. If we say that 10% of the students scored 95 marks and 20% scored 90 marks then calculate average marks of the remaining students of the class.

###### Q.4It was intended that Rs. 585 be divided among P, Q and R in the ratio of 4 : 3 : 2, but by mistake the distribution was made in the proportion of 1/4 : 1/3 : 1/2. How much does 'R' gain by the error ?