Each question carries three marks.
Q.11 The radius of a right circular cylinder is 7 cm and its height is 14 cm find its
curved surface area and total surface area.
Q.12 Evaluate by using suitable Identity.
(a) 65×55
(b) Find the value of ‘a’ 12a = 50 ×50 – 38×38
Q.13 If x 1 =5 find the value of x2 + 1 and x4 + 1 .
x x
2
x
4
Q.14 What should be subtracted from 6x2
-31x +47 so that the resulting polynomial
is exactly divisible by 2x-5.
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Answer:
65(55) = 3575 this ur Answer
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