The angle of elevation of sun changes from 30 ° to 45 °, the length of the shadow of a pole decreases by 4 meters, the height of the pole is (Assume √3 = 1.732) 

The angles of elevation of the top of a temple, from the foot and the top of a building 48 m high, are 60^o and 30^o respectively. The height of the temple is more than the building. The height of the temple is-

If 0.5x + 0.7y=0.5 and 0.7x + 0.5y=0.7,then the value of x+y is

A and B together can do a piece of work in 12 days which B and C together can do in 16 days. After A has been working at it for 5 days and B for 19 days, C finishes it in 7 days. In how many days B could finish the whole work? 

A person swims a distance of 28 km. in the direction of stream in 5 hours and a distance of 13 km. in 5 hours against the stream. What is the velocity of the stream?

The bar graph given below shows the production of sugar (in lakh tonnes) by two different companies P and Q for the given years.

J1 = percentage increase in production of sugar of company P from 1991 to 1995.

J2 = percentage increase in production of sugar of company Q from 1992 to 1994.

What is the value of J1 + J2?

If the number 247_679 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be