Home
Class 10
MATHS
The correct answer a/b/c/d...


The correct answer a/b/c/d

A

Both Assertion (A) and Reason (R ) are true and Reason ( R) is a correct explanation of Assertion (A).

B

Both Assertion (A) and Reason (R ) are true but Reason (R ) is not a correct explanation of Assertion (A).

C

Assertion (A) is true and Reason (R ) is false.

D

Assertion (A) is false and Reason (R ) is true.

Text Solution

Verified by Experts

The correct Answer is:
D

The Reason (R) is clearly true
Total surface area =`3pir^2=(3xx(22)/7xx7xx7)cm^2=462cm^2`
Cost of painting `= ₹(462 xx5)=₹ 2310`
`therefore` Assertion (A) is false and Reason (R )is true.
So, the correct answer is (d)
Promotional Banner

Topper's Solved these Questions

  • VOLUME AND SURFACE AREAS OF SOLIDS

    RS AGGARWAL|Exercise Multiple Choice Questions (Mcq)|66 Videos
  • TRIGONOMETRIC RATIOS OF COMPLEMENTARY ANGLES

    RS AGGARWAL|Exercise Exercise 12|15 Videos

Similar Questions

Explore conceptually related problems

Match the following columns : The correct answer is (a) ......... " " (b) ........... (c)......... " " (d) .........

Is ||gm ABCD a square? I. Diagonals of ||gm ABCD are equal. II. Diagonals of ||gm ABCD intersect at right angles. The correct answer is : (a) /(b)/(c )/(d).

Is quadrilateral ABCD a ||gm? I. Diagonals AC and BD bisect each other. II. Diagonals AC and BD are equal. The correct answer is : (a) /(b)/(c )/(d).

Is quadrilateral ABCD a parallelogram? I. Its opposite sides are equal. II. Its opposite angles are equal. The correct answer is : (a) /(b)/(c )/(d).

Is quadrilateral ABCD a rhombus ? I. Quadrilateral ABCD is a ||gm. II. Diagonals AC and BD are perpendicular to each other. The correct answer is : (a) /(b)/(c )/(d).

Assertion (A) : If three angles of a quadrilateral are 130^@,70^@ and 60^@ then the fourth angle is 100^@ Reason(R) : The sum of all the angle of a quadrilateral is 360^@ The correct answer is : (a) /(b)/(c )/(d).

The probability of guessing the correct answer to a certain test questions is (x)/(12) If the probability of not guessing the correct answer to this question is (2)/(3) then x=(a)2(b)3(c)4 (d) 6

A list of animals is given below. Identify the animals with open circulatory system and choose the correct answer. (A) Acidia (B) Cockroach (C) Earthworm (D) Prawn (E) Silverfish (F) Snail (G) Squid

In each of the Exercises choose the correct answer: If A and B are events such that P(A|B), then (a) AsubB but A!=B (b) A" "=" "B (c) AnnB=varphi (d) P" "(A)" "=" "P(B)