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22. A circular garden of radius 15m has a 2m wide circular path inside arround it. Find the area of thepath.23. Find the radius of a sphere whose surface area is 616 cm2.24. Evaluate : Cos 43o. Cot 79o– Sin 47o. tan 11o25. A pole of height 6 m casts shadow of 2 3 m on the ground. Find the Sun’s elevation.26. Evaluate a3+b3, if a+b = 7 and ab = 12.

Answer»

22 ) Let the RADIUS of OUTER CIRCLE be (R ) = 15 cm
so the radius of inner circle (r) = 15-2 =13 cm
area of PATH =22/7 ( 225- 169)
= 22/7 × 56
= 22×8 = 176



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