## S-5-30-The sum of first six terms of an A.P is 42. The ratio of its 10th term to its 30th term is 1 : 3. Find the 1st term and the 13th term of the A.P.

The sum of first six terms of an A.P is 42. The ratio of its 10th term to its 30th term is 1 : 3. Find the 1st term and the 13th term of the A.P. Or For what values of Read More …

## S-5-29-A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, as shown in fig-7. If the height of the cylinder is 10 cm and its base is of radius 3.5 cm, find the total surface area of the article.

A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, as shown in fig-7. If the height of the cylinder is 10 cm and its base is of radius 3.5 cm, find the total surface Read More …

## S-5-28-From the top of a building 100 m. high, the angles of depression of the top and bottom of a tower are observed to be 45o and 60o respectively. Find the height of the tower. Also find the distance between the foot of the building and the bottom of the tower. (√3=1.732)

From the top of a building 100 m. high, the angles of depression of the top and bottom of a tower are observed to be 45o and 60o respectively. Find the height of the tower. Also find the distance between the foot Read More …

## S-5-27-In fig-6, AB and CD are two diameters of a circle with center at O. AB ⊥CD . OD is the diameter of the smaller circle.Given that, OA = 7 cm, find the area of the shaded region. (π =22/7)

In fig-6, AB and CD are two diameters of a circle with center at O. AB ⊥CD . OD is the diameter of the smaller circle.Given that, OA = 7 cm, find the area of the shaded region. (π =22/7)

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