Question

Plz solve part b all ques

Answer 1

Answer:

27). D) option is correct.

28). a) option is correct.

29). b) is correct.

30). D) is correct.

Step-by-step explanation:

$27) \: \: \: \: \: \: \: distance = 1.2 \times 60 \\ \\ = 72 \: m. \\ \\ \\ \\ 28) \: \: \: \: \: \: \: aa \: \: \: \: \: criteria. \\ \\ \\ \\ 29) \: \: \: \: \: \: \: \frac{3.6 \times 100}{90} = \frac{be}{de} \\ \\ \frac{360}{90} = \frac{be}{de} \\ \\ be = 4(de) \\ \\ 1.2 \times 4 + de = 4de \\ \\ 4.8 = 3de \\ \\ de = 1.6 \: m. \\ \\ length \: of \: shadow \: after \: 4 \: sec \: is \: 1.6 \: m. \\ \\ \\ \\ \\ \\ 30) \: \: \: \: \: \: \frac{ac}{ce} = \frac{ae - ce}{ce} = \frac{ae}{ce} - 1 \\ \\ = \frac{ab}{cd} \\ \\ = \frac{3.6 \times 100}{90} = 4 - 1. \\ \\ \frac{ac}{ce} = 3.$