# Lecture-8

00:01:27 NCERT Optional Exercise 3.7 Question 2 One says, “Give me a hundred, friend! I shall then become twice as rich as you”. The other replies, “If you give me ten, I shall be six times as rich as you”. Tell me what is the amount of their (respective) capital? [From the Bijaganita of Bhaskara II]

00:08:57 NCERT Optional Exercise 3.7 Question 3 A train covered a certain distance at a uniform speed. If the train would have been 10 km/h faster, it would have taken 2 hours less than the scheduled time. And, if the train were slower by 10 km/h; it would have taken 3 hours more than the scheduled time. Find the distance covered by the train.

00:17:17 NCERT Optional Exercise 3.7 Question 4 The students of a class are made to stand in rows. If 3 students are extra in a row, there would be 1 row less. If 3 students are less in a row, there would be 2 rows more. Find the number of students in the class.

00:27:27 NCERT Optional Exercise 3.7 Question 5 In a ∆ ABC, ∠ C = 3 ∠ B = 2 (∠ A + ∠ B). Find the three angles.

00:33:17 NCERT Optional Exercise 3.7 Question 8 ABCD is a cyclic quadrilateral (see Fig. 3.7). Find the angles of the cyclic quadrilateral.

00:41:17 NCERT Optional Exercise 3.7 Question 7 part (i) (ii) (iii) (iv) (v)

00:01:03 NCERT Optional Exercise 3.7 Question 6