Morning walk is a good habit for a healthy mind and physical fitness. To maintain his health and fitness, a boy of height 1.8m is walking away from the base of a lamp post at a speed of 2 m/sec. The lamp is 6.6m above the ground. (f) Find the distance of boy from the lamp post after 16 sec:
(i) 16 (ii) 32 (iii) 8 (iv) 64
(g) To prove ⊿ABR ~⊿PQR, which of the following criterion of similarity is applicable
(i) AAA (ii) SAS (iii) SSS (iv) None of these
(h) Which of the following mathematical concepts is used for finding the length of shadow of the boy
(i) Congruence (ii) Similarity (iii) Pythagoras (iv) None of these
(i) Find the length of shadow after 16 sec
(ii) 18.4m (ii) 12.4m (iii) 12m (iv) 20m
(j) If the distance of boy from lamp post is 30m then time taken to cover this distance is:
(i) 25 sec (ii) 15 sec (iii) 10 sec (iv) 30 sec