Question

1) Two semicircular parts are removed from a semicircular disc, as shown in Fig 7.
(1) Find area of the shaded region.
(ii) If a thread is to be placed around the boundary of the shaded region, find the
length of the thread required.
R
40 m
Fig. 7​

Answer 1

Step-by-step explanation:

1. Hydroelectricity, or hydroelectric power, is electricity produced from hydropower. In 2015, hydropower generated 16.6% of the world's total electricity and 70% of all renewable electricity, and was expected to increase by about 3.1% each year for the next 25 years.