Question

Four identical Memento is made by School to awarding 4 students for 4 values Honestly, punctuality,cleanliness and non violence. If each Memento is made as shown in the figure and its base PQRS is silver plated from the front side at the rate of rupees 20 per centimetre square.


(a)find the area of quadrant OSRO
(b)find the area of triangle POQ
(c) find the total cost of silver painting
(d)find the length of arc SR

please provide the right answer​

Answer 1

Step-by-step explanation:

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Answer 2

Given:

The memento is school to awarding $4$ students for $4$ values honestly the rate of rupees $20 per cm^{2}$.

To find:

find the area of quadrant $OSRO$, find the area of triangle $POQ$, find the total cost of sliver painting, find the length of arc $SR$.

Step-by-step explanation:

Area of the quadrant $OSRO$$=\frac{1}{4}\pi r^{2}$

$=\frac{1}{4}*\frac{22}{7}*7*7$

$=38.5cm^{2}$.

Area of right angled $POQ$$=\frac{1}{2}*PO*QO$

$=\frac{1}{2}*10*10$

$=50cm^{2}$

Area of the base $PQRS$, which is to be silver plated=area of $(POQ)$-area of $(quadrant OSRO)$

$=50-38.5$

$=11.5cm^{2}$

Total area to be silver plated$=4*11.5$

$=46cm^{2}$

Total cost of sliver plating=$46*20=920$

Answer:

Therefore, The area of quadrant $OSRO$ $38.5cm^{2}$, The of right angled $POQ$ is $50cm^{2}$,Total area to be silver plated is the $46cm^{2}$.