Question

Giovanni is heating up mini frozen pizzas in the microwave. Each pizza takes 3 ¾ minutes to cook. How long will it take Giovanni to heat up 3 pizzas? *

Answer 1

Time taken by a pizza to get cooked $=\tt 3 \frac{3}{4} \: minutes$

Number of pizzas with Giovanni = 3

Time that will be taken to heat up 3 pizzas :

$=\tt 3 \frac{3}{4} \times 3$

$= \tt\frac{4 \times 3 + 3}{4} \times 3$

$=\tt \frac{12 + 3}{4} \times 3$

$= \tt\frac{15}{4} \times 3$

$= \tt \frac{15 \times 3}{4}$

$= \tt \frac{45}{4}$

$\color{plum} =\tt 11 \frac{1}{4} \: minutes$

Therefore, Giovanni will take $\color{hotpink}\tt \bold{11 \frac{1}{4}} \: minutes$ to heat up 3 pizzas.