If a horse takes 10 mt 12 sec if it goes round a circle one and then reaches the centre, what would have been the time terren by the horse if he had gone round the circle only?
Answers
Answer:
Check below the solved MCQs from Class 10 Maths Chapter 12 Areas Related to Circles:
1. If the sum of the areas of two circles with radii R1 and R2 is equal to the area of a circle of radius R, then
(A) R1 + R2 = R
(B) R12 + R22 = R2
(C) R1 + R2 < R
(D) R12 + R22 < R2
Answer: (B)
Explanation: According to given condition,
Area of circle = Area of first circle + Area of second circle
πR2 = πR12 + πR22
R2 = R12 + R22
Also Check: CBSE Class 10 Science
Answer:
Answer: (B)
Step-by-step explanation:
1. If the sum of the areas of two circles with radii R1 and R2 is equal to the area of a circle of radius R, then
(A) R1 + R2 = R
(B) R12 + R22 = R2
(C) R1 + R2 < R
(D) R12 + R22 < R2
Explanation: According to given condition,
Area of circle = Area of first circle + Area of second circle
πR2 = πR12 + πR22
R2 = R12 + R22