Question

placements
cer
when empty
brass = 8500 kg/m) [Ans.: 0.04 m')
6. The density of copper is 8.96. Express its
density in g/cm' and kg/m'.
[Ans.: 8.96 g/cm'; 8960 kg/mn']
yrardo 7. A beaker of capacity 50 mL weighs 27 g
and 90 g when filled with
glycerine. What is the density of glycerine in
kg/m? [Ans.: 1260 kg/m]
8. In an experiment, an iron sphere of mass
390 g displaces 5 cm of water. What is the
density of iron? [Ans.: 78 g/cm]
9. Deepa covers a distance of 27 km in
90 minutes. What is her speed in km/h and
m/s? [Ans.: 18 km/h; 5 m/s]
10. A motor cycle travels at 20 m/s and reaches
its destination in 4 hr. How far does it travel?
Express the answer in km. [Ans.: 288 km]​

Answer 1

Answer:

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Question

The 5th term of an arithmetic sequence

is 5 and the sum of the first 5 terms is

55. What is its first term

(a) 15 (b

Explanation: