10. In Fig. 13.12, you see the frame of a lampshade. It is to becovere

1.	10. In Fig. 13.12, you see the frame of a lampshade. It is to becovered with a decorative cloth. The frame has a basediameter of 20 em and height of 30 cm. A margin of 2.5 cmis to be given for folding it over the top and bottom of theframe. Find how much cloth is required for covering thelampshadeFig li s
Answer» Here r =(20/2) cm =10cm and h=30 cm +2×2.5cm =35cm Cloth required for covering the lampshade. =It's curved surface area=2πrh=(2×22/7×10×35)cm square =2200cm square.

10. In Fig. 13.12, you see the frame of a lampshade. It is to becovered with a decorative cloth. The frame has a basediameter of 20 em and height of 30 cm. A margin of 2.5 cmis to be given for folding it over the top and bottom of theframe. Find how much cloth is required for covering thelampshadeFig li s

Answer»

Here r =(20/2) cm =10cm and h=30 cm +2×2.5cm =35cm

Cloth required for covering the lampshade.

=It's curved surface area=2πrh=(2×22/7×10×35)cm square

=2200cm square.