Question

If the perimeter of a rectangle is 82cm and its diagonal is 29cm long, what is the area of the rectangle?If the perimeter of a rectangle is 82cm and its diagonal is 29cm long, what is the area of the rectangle?​

Answer 1

Answer:

Power of water =2 kw=2000w

Mass of water =200kg

difference in temperature ΔT=70−10=60

o

C

Concept

energy required to heat the water = energy given by water in time t=pt

energy required to increase tempeature of water by 60

o

C,Q=msΔT

S= specific heat =4200J/kg

o

C

pt=msΔT

2000×t=200×4200×60

t=25200

or t=25.2×10

3

sec.

Step-by-step explanation:hdnxnnxhzgCgshgsgshdhhfjdjjdidjjririrjdikdkdokdkfjsjsjjdjdjjfkdydufifhchcgkfhu

Answer 2

Answer:

420

Step-by-step explanation:

Question: If the perimeter of a rectangle is 82cm and its diagonal is 29cm long, what is the area of the

rectangle?

a. 420 cm?

b. 441cm2

C. 400 cm2

d. 900 cm?