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 ?