Rafiq exercised for 3/6 of an hour, while Rohit exercised for 3/4 of an hour. Who exercised for a longer time?

Four metal conductors having different shapes 1. a sphere 2. cylindrical 3. pear 4. lightning conductor are mounted on insulating stands and charged. The one which is best suited to retain the charges for a longer time is

It takes 12 hours to fill a swimming pool using two pipes. If the pipe of longer diameter is used for 4 hours and the pipe of smaller diameter is used 9 hours, one half of the pool is filled. How long would it take for each pipe to fill the pool separately.

What fraction of a clockwise revolution does the hour hand of a clock turn through, When it goes from (a) 3 to 9

Michacl finished colouring a picture in frac{7}{12} hour. Vaibhav finished colouring the same picture in frac{3}{4} hour. Who worked longer? By what fraction was in longer?

What fraction of a clockwise revolution does the hour hand of a clock turn through, When it goes from (f) 6 to 3

The reaction : A rarr B follows first order kinetics . The time taken for 0.8 mol of A to produce 0.6 mol of B is 1 hour . What is the time taken for conversion of 0.9 mol of A to produce 0.675 mol of B ?

A manufacturing company makes two modeis A and B of a product. Each piece of model A requires 9 labour hours for fabricating and 1 labour hour for finishing. Fach piece of model B requires 12 labour hours for fabricating and 3 labour hours for finishing. For fabricating and finishing, the maximum labour hours available are 180 and 30 respectively. The company makes a profit of Rs. 8,000 on each piece of modal A and Rs. 12,000 on week maximum profit ? What is the maximum profit per week ?

In a culture, the bacteria count is 1,00,000. The number is increased by 20% in 3 hours. In how many hours will the count reach 2,00,000, if the rate of growth of bacteria is proportional to the number present?