Question

Meena needs to serve mango juice to her guests in cylindrical tumblers of radius 7 cm up to a height of 10 cm. If she wants to serve 25 guests, how much juice does she need to prepare?

• A. 35 L
• B. 42.5 L
• C. 38.5 L
• D. 50 L

Answer 1

The correct option is C

38.5 L

Given,

Radius of the cylindrical tumbler, $r$ = 7 cm

Height of the cylindrical tumbler, $h$ = 10 cm

$\therefore$Volume of each tumbler $=\pi$$r^{2}h$
$=\frac{22}{7}\times 7^2\times 10$
$=1540c{m}^3$

Total volume of juice required = Volume of each tumbler $\times$ total number of guests

$=1540\times 25=38500c{m}^3=38.5$ L (1 L = 1000 cm${}^2$)