The length of a rectangle is increased by 60%. By what percent would the width have to be decreased to maintain the same area?

1) 37 ½ %

3) 75%

2) 60%

4) None

A starts a business on Jan.1 with an investment of Rs.80,000. Four months later B joins with an investment of Rs.60,000. The percentage of profit B will get at the end of the year is nearly 
 1.42%
 2.37%
 3.33%
 4.31%

Mahesh bought 50 kg of wheat at Rs.8 per kg and 150 kg at the rate of Rs. 7 per kg. He sold the mixture to get 12% profit. At what price per kg did he sell the mixture?

1)  Rs. 7.37

2)  Rs  7.84

3)  Rs. 8.40

(4) None of these