Write a word problem using 9 and 10 as factors?

First let’s create a word problem using the factors 9 and 10.
=> Maria bought 9 couple shirts and the price of each pairs of couple shirt is 10 dollar. Now, find the total amount that Maria spent for the 9 couple shirt that she bought.
Now, let’s show the solution to our given word problem
=> Number of pairs of couple shirt = 9
=> Amount of each pairs of couple shirt = 10 dollars
=> 9 x 10
=> 90
Thus Maria paid 90 dollars in total.

Jhon wanted to get to 9 and tried 4x3 but no it is 12 but finally he got the answer the answer is 3x3=9. Halo wanted to get to 10 but he was confused so he tried 5x6=30 nope this is surely not the answer then his teacher gave him a hint the hint was hey Halo 5+5=10 so can you figure it out by multiplying it? he instantly got the answer it was 5x2=10. yay! he shouted.

The lateral side of a triangular pyramid is a triangle. in order to increase the lateral surface area, the slant height and the height should be altered