PA and PB are two tangents drawn from an external point P to a circle with centre C and radius 4 cm. If PA ⊥ PB, then length of each tangent is _______.

The first three terms of an AP are (3y – 1), (3y + 5) and (5y + 1), the value of y is _____.

OR

If 18, a, (b – 3) are in AP, then value of (2a – b) is ____.

tan 10° tan 15° tan 75° tan 80° = _____.

Find the values of k for which the system of equations kx – y = 2, 6x – 2y = 3 has a unique solution.

At a DIWALI mela, a stall keeper in one of the food stalls has a large cylindrical vessel filled with orange juice and small cylindrical glasses.

(i). If the small cylindrical glass having base radius 2r and height h is open at the top, then total surface area is

(a) 2πr(r + h)

(b) 3πr(r + h)

(c) 4πr(r + h)

(d) None of the above

(ii) Volume of the large cylindrical vessel of radius R and height H is

(a) πR²H

(b) 1/3πR²H

(c) 4/3πR³

(d) 2/3πR³

(iii) If large cylindrical vessel has base radius = 15 cm, height = 32 cm and small cylindrical vessel has base radius = 3 cm, height = 8 cm. Then the number of small cylindrical vessel filled with juice out of a large cylindrical vessel is

(a) 500

(b) 100

(c) 150

(d) 200

(iv) If the stall keeper sold small glass of juice for Rs 3 each, amount received by the stall keeper by selling the juice completely is

(a) ₹ 250

(b) ₹ 275

(c) ₹ 300

(d) ₹ 325